Why does vision gradually becomes dimmer in bright setting?

Why does vision gradually becomes dimmer in bright setting?

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I don't know if this is only happens to me, but if I am in a well lit room and I stare at one point or just look at one area without moving my eyes around my vision in that specific light setting becomes dimmer. I can look around and everything feels like it is dim and lacks the bright light that originally radiated through the room. So I was wondering how and why this happens? I suspect(I am quite dusty in my ophthalmology) my eyes maybe relaxing and taking less notice of the intensity of the light, if so what makes it do so? As a side note this occurrence hasn't affected my life, I am just curious as to why it happens. Another note response to some of the comments, this isn't like walking into a well lit room and get bombarded by the light and eventually adjusting to it. This is like sitting in a well lit room for 15 minutes and then things just become dimmer and less intense. I've also observed this only happens with artificial light and may have some link to the type of light bulb.

I would like to add that this happens if I concentrate on one area or object. So if I were to read a book or be on my laptop, the light around me would feel dimmer. I suspect it has something to do with my eyes focusing on one source, if I were reading a book and this happens, the words become more prominent.

There are many causes of blurry vision, but let’s get more specific: Your vision suddenly—not gradually—becomes blurred, and this lasts only minutes, maybe even 30 seconds, and then everything is back to normal, as though nothing had happened.

This may deceive you into thinking nothing serious happened. But most likely, something very sinister just did.

Sudden onset blurry vision that doesn’t last long can be caused by a transient blood clot in the brain.

Here is what Cindy P. Wang, O.D., F.A.A.O., with South Pasadena Optometric Group in CA.says about this:

“If the visual disturbances are similar to a slow dimming of vision or blacking out of vision, and it lasts for 5-10 minutes, then it is likely caused by a mini-stroke, also known as a transient ischemic attack (TIA).”

Though the visual problem, caused by a TIA, is sometimes described as dimming or fading out, it’s also possible for a TIA to specifically cause sudden blurred vision that’s only temporary (a TIA, by definition, is temporary).

It may last less than five minutes, too.

In fact, states that “sudden blurred or decreased vision in one or both eyes” is one possible symptom of a TIA.

Medical Emergency

This is a medical emergency, ”caused by, but not limited to, atherosclerosis, carotid artery stenosis, heart disease, hypertension and diabetes,” says Dr. Wang.

“In this case, you should see your primary care physician or neurologist as soon as possible, especially if accompanied by other symptoms such as headaches, scalp tenderness or fever, which may indicate an inflammatory cause of vision loss.”

You should seek immediate medical attention, as TIAs are harbingers of future strokes. Below is the “FAST” guide for identifying a TIA or stroke.

If you’ve had a transient ischemic attack, it means there’s likely a partially blocked artery leading to your brain or a clot source in the heart.

Inside The Delicate Biology Of Human Night Vision

Why does the side of my vision see better than the centre of my vision in the dark? originally appeared on Quora: the knowledge sharing network where compelling questions are answered by people with unique insights.

Answer by Joyce Schenkein, Neuropsychologist, College Professor, Vision Scientist, on Quora:

The eye has two kinds of photoreceptors that convert light into electrical activity: rods and cones.

It is necessary to “divide the labor” between two cell types to enable the eye to see over an enormous range of illumination, going from the lower limit of a matchlight one mile away (2–5 photons per receptor) to the upper limit of 12 o’clock noon on a snow-covered mountain (a veritable tsunami of photons).

When very little light is present, it is unlikely that a single photoreceptor will be sufficiently activated to generate a signal. So rods (which enable us to see in dim light) are wired together. At every moment in the dark, each rod contributes “something” to excite the nerve. If, say, 100 rods are wired together, they can collectively contribute to the needed voltage to excite the nerve.

The tradeoff for creating this army of rods is that the nerve has no way of knowing which rod contributed the most input at any given moment. For example, if you collected charity contributions in an office, you would know how much money was collected for the entire office, but not which employee gave the most. For this reason, rod vision is not very sharp. Rods “see” the activity of the whole office rather than for the individual donors. This loss of acuity is a tradeoff for being able to see at all.

Rod-related loss of acuity is why, at night, something moving in the distance may look like an animal. But as you get closer, it might really be a paper bag. Also, because rods are only responsive to the blue end of the spectrum, they are blind to red light and are also colorblind. Hence, the saying “at night, all cats are grey.” Cones, on the other hand, have a one-to-one ratio of wiring from the photoreceptor to the nerve. Since cones function as “every man for himself”, they can only operate when lots of light is available.

The one-to-one ratio of cones to nerves enables each nerve to keep better track of inputs and to generate sharper vision. You know you are using your cones if you can see color. Once your red shirt looks like mud and you can’t read small writing on it, you are using your rods.

You see better from the periphery of your eye at night. This is because rods and cones "reside” in different places in the retina. Cones are located more centrally. During the day, when you want to see something clearly, you position your eye so that the image is focused on the fovea, where your cones are.

At night, however, there is not enough light to activate the cones. If you look directly at an object, you will see nothing at all. Therefore, you have to look askance so that the image falls on the periphery, where the rods hang out.

Notice that the great preponderance of cones are found at the fovea and macular area (central 5 degrees). The poor person with macular degeneration is unable to see things by looking straight at them.

Animals with all-rod eyes tend to be active at night. Some animals, like cats, have a membrane at the retina called the tapedum, which is like a “trampoline for photons”. Any photons that enter the eye and are not absorbed bounce along the tapedum. This gives them an additional chance to find a photoreceptor. This is also why the eyes of these animals “glow in the dark.” Some of the bright light you shine in their eyes bounces back at you.

Exclusively night animals who have no cones cannot see red light. This is why, when they are displayed in dark rooms at the zoo, the animal thinks it’s night. But you, using your cones, can see in red light. So you can see the animal in its cage.

One other neat fact: as the sun sets, we go through a process called dark adaptation where the eye gradually becomes sensitive to less and less light. The entire process takes about 45 minutes, which is precisely the amount of time it takes the sun to set. Thus, a creature living in nature would not find itself suddenly blind once the sun went down because the eye adjusts to the increasing darkness in lockstep with the sunset.

This question originally appeared on Quora. Ask a question, get a great answer. Learn from experts and access insider knowledge. You can follow Quora on Twitter, Facebook, and Google+. More questions:

While a few floaters in your field of vision is usually OK, it's not so normal to have a sudden onslaught of tiny particles swirling across your eye. This can be another sign of a retinal tear or retinal detachment. If you get yourself treated quickly, it can be fixed via surgery.

Have you noticed halos or circles when you look at lights at night? If so, it could be a sign of an eye disease called glaucoma — a condition that causes damage to your eye’s optic nerve, and that gets worse over time. Usually it has to do with the pressure in your eye, which can be alleviated (and controlled) with eye drops or surgery.

What the “Brightness” Setting Actually Does

Unlike “brightness” on your phone or computer screen, the brightness setting on most televisions actually doesn’t control how bright or dim your TV is. Instead, it controls the black levels. (A better word for this setting might be “lightness”.)

Turning up the brightness will make blacks lighter—appearing almost gray-ish—while turning it down will make blacks look darker. This setting is designed to help you calibrate your TV. No matter how much you adjust it, your screen won’t actually get brighter—so it won’t help you see the screen better in a well-lit room.

1 Answer 1

17-Nov-15: Received a response from GE Lighting: This product (LED22A50/150) was designed to have the highest light setting in the middle position.

In other words, the order of the light settings is low(50), high(150) and medium(100).

This was done so that if you use the bulb in a single wattage socket it will light on the highest light setting.

Wonderful! So it works in a single wattage socket AND doesn’t behave like a standard three-way bulb!

10 signs and symptoms of eye problems

The following signs and symptoms can indicate a medical emergency or an urgent condition that could cause significant vision loss over time. In most cases, you should see your eye doctor as soon as possible if you experience:

1. A sudden onset of many spots and floaters in your field of vision

Usually,਎ye floatersਊre due to a benign, age-related condition called vitreous detachment . This occurs when the eye&aposs gel-like interior liquefies and separates from the retina, the light-sensitive inner lining of the back of the eye. 

But a sudden onset of spots and floaters also can be caused by a serious, sight-threatening tear or detachment of the retina. If you suddenly see a shower of spots and floaters, see an eye doctor immediately.

2. A sensation that a dark curtain has settled across your field of view

This could be caused by a retinal detachment, which occurs when the retina separates from the underlying layer of nourishing blood vessels (choroid). If the retina is not reattached within hours, vision loss can be permanent.

3. Sudden eye pain, redness, nausea and vomiting

These symptoms can signal a sudden (acute) attack of narrow-angle glaucoma, which can permanently damage the eye&aposs optic nerve. Immediate treatment is required to prevent permanent vision loss.

Double visionꃊn be caused by many eye conditions. In some cases, double vision also can signal an underlying health emergency such as a stroke. If you have a sudden onset of double vision, see an eye doctor immediately.
5. Sudden blind spot in one eye

If you are over 60, your chance of developing a macular hole in the most sensitive part of the retina. Because macular holes can worsen and cause permanent loss of vision, it&aposs important to see an eye doctor immediately if you notice a gray area or blind spot when viewing objects with one eye.

6. A narrowing of your field of view

A reduction of your ability to see objects off to the sides could be a sign of glaucoma. Without intervention, peripheral vision loss could continue to worsen, leading to tunnel vision or even blindness.

7. A gray, blurry or distorted spot in the center of your visual field

These symptoms may be caused by macular degeneration (AMD), a leading cause of blindness among older Americans. In the past, there was no effective treatment for macular degeneration. But today, new medical treatments sometimes can halt or limit AMD-related vision loss.

8. Poor night vision, halos around lights or less vivid color vision

These vision changes may be due toꃊtaracts. Cataracts tend to worsen gradually over time and are not a medical emergency. Nevertheless, as your eye&aposs natural lens continues to cloud with aging, your vision will continue to deteriorate unless you haveꃊtaract surgery that replaces your cloudy lens with a custom intraocular lens (IOL). If you wait too long for cataract surgery, you increase your chance of complications such as glaucoma. Also, if cataract surgery is postponed too long, the cloudy lens can harden and become more difficult to remove.

9. Blurred vision and gray areas in your visual field

If you have diabetes, these vision problems may be due to the onset of਍iabetic retinopathy. Regular eye exams are essential for diabetics, particularly if you are over age 60. By evaluating the condition of your retina, your eye doctor can provide valuable information to your general physician about the control and severity of your diabetes.

10. Red, "scratchy," irritated eyes

These signs and symptoms are most commonly due to਍ry eye syndrome. Dry eyes usually are more of a nuisance than a sight-threatening condition. But symptoms can be severe, particularly as you grow older and your body produces fewer tears or your tear chemistry changes. Consult your eye care practitioner for advice about remedies, which may include over-the-counter or prescription਎ye drops.

How is a cataract treated?

If your cataract symptoms are mild, you might just need a new prescription for glasses or contacts. Cataracts usually worsen over time, though. Eventually, your doctor will likely recommend surgery to remove the cataract.

At what stage should cataracts be removed?

Most people wait until a cataract causes enough vision loss to be a problem, like making it hard to read or drive. Sometimes people need cataract surgery to see and treat other eye conditions, such as age-related changes in the retina (tissue at the back of the eye) or diabetic retinopathy.

Who removes cataracts?

An ophthalmologist (doctor who specializes in eye health) performs cataract removal surgery.

How are cataracts removed?

During cataract surgery, the surgeon removes the clouded lens and replaces it with an artificial lens implant. The new lens is clear, shaped to fit your eye and personalized to your vision needs.

Cataract removal takes about an hour. It’s done with local anesthesia (medication to numb a specific area). Your doctor will use eye drops or a shot to numb your eye. You’ll be awake, but you won’t feel or see the procedure.

What are the different types of cataract surgery?

There are two types of procedures to remove cataracts:

Phacoemulsification cataract surgery

Phacoemulsification is the most common procedure for cataracts. Your ophthalmologist makes a small opening in the eye to reach the clouded lens. Using high-frequency sound waves (ultrasound) or a laser, your ophthalmologist breaks the lens into pieces. Then the doctor suctions lens fragments from your eye and puts in a new plastic lens.

Extracapsular cataract surgery

Your doctor might recommend this procedure if the phacoemulsification technique isn’t a good option for you. For example, an advanced cataract might be too dense to break apart easily.

In extracapsular cataract surgery, your ophthalmologist makes a larger opening in the eye. Instead of breaking up the lens and then removing it, your doctor removes the lens in one piece. Then the surgeon inserts the manufactured lens.

What can I expect after surgery?

After surgery, it’s typical to have a day or two of:

  • Itching.
  • Mild discomfort.
  • Watery eye.
  • Sensitivity to light.
  • Blurry vision.

For a few weeks after surgery, you may need to use eye drops. The drops help you heal, prevent infection and control the pressure inside your eye. During those weeks you’ll also want to avoid:

  • Touching your eyes.
  • Bending over.
  • Lifting heavy things.
  • Doing anything that risks injuring your eye.

How much time does it take to recover from cataract surgery?

Your eye should heal within eight weeks. But you can go about your daily activities as soon as a day after the surgery.

Is cataract surgery safe?

Cataract surgery is one of the safest and most frequently performed surgeries in the U.S. The chance of any complications is extremely low. But you should always discuss the risks of any surgery with your doctor. Some people do have an infection or vision loss after the procedure.

How painful is cataract surgery?

You shouldn’t feel anything during the cataract removal surgery. Afterward, you may have mild pain and discomfort. Your doctor can give you a pain reliever to use for the first day or two.

Sir Arthur Eddington's experiment.PNG

Sir Isaac Newton's theory of gravity predicts that the path of starlight should bend 0.87 arcseconds as it passes the sun's edge. An arcsecond is 1/60 of an arcminute, or 1/3600 of a degree, a very small angle. In Newton's theory, gravity is a force between two objects, proportional to the product of the masses and inversely proportional to the square of the distance between. Light, which Newton thought to be a particle with mass, would therefore be pulled toward the mass of the Sun as it flew by.

Albert Einstein's theory of gravity is radically different. Gravity isn't a force. Instead, Einstein conjectured, it is a feature of spacetime geometry. Einstein's theory predicts a deflection angle of 1.75 arcseconds for starlight grazing the Sun.

The eclipse during which Eddington tested Einstein's prediction occurred on May 29, 1919. I imagine Eddington and his fellow experimenters wringing their hands in the morning. It was cloudy in Sobral. In Principe, where Eddington was stationed, "there was a very heavy thunderstorm from about 10 a.m. to 11.30 a.m.—a remarkable occurrence at that time of year" (Dyson et al. 1920). The men must have been worried. This was no family excursion like I experienced in 1979. These were costly expeditions with a grand purpose. Fortunately, at both locations, the clouds were thin and intermittent during totality, and satisfactory photographs were obtained.

Eddington and company analysed their data and declared victory in a report read to the Joint Permanent Eclipse Committee of the Royal Society and the Royal Astronomical Society on November 6, 1919, in London. The measured deflections at the Sun's edge were 1.98 ± 0.12 arcseconds from Sobral and 1.61 ± 0.30 arcseconds from Principe. Of the two most likely outcomes—0.87 arcseconds from Newton's theory and 1.75 arcseconds from Einstein's theory—the results were closer to 1.75 arcseconds. "Einstein Theory Triumphs" was a headline in the November 10 issue of The New York Times.

Modern Eddington Experiment

The next total eclipse in the United States is August 21, 2017. I start fantasising about performing Eddington's 1919 experiment. My bubble is burst when I read on NASA's Testing General Relativity website that this is a very hard project for the unskilled amateur. A link is provided to an article by a skilled astronomer, Donald Bruns, who will perform the experiment near the top of Casper Mountain in Wyoming. Donald introduces me to a group collaborating to perform the Modern Eddington Experiment at locations from Oregon to Georgia. The group organizer, Toby Dittrich, is a physics professor at the Sylvania campus of Portland Community College, which is less than a mile from my home! I attend his lecture on the subject and join the group's email exchange. I may not be able to perform the experiment myself, but I'd love to see it done. I arrange to observe Richard Berry, former Editor of Astronomy Magazine, and his team perform the Modern Eddington Experiment in Lyons, Oregon, near Salem.

General Relativity

Before I witness the experiment, I study relativity. I start with special relativity, which Einstein gave us in 1905. Increments of time and space, it turns out, are not absolutes. You and I will measure different increments of time and calculate different increments of distance between two events if we’re moving at different speeds (this effect isn’t noticeable for the common speed differences we experience). Increments of spacetime, the mathematical fusion of space and time, are absolute. You and I will calculate the same spacetime increment between two events regardless of our different speeds.

Special relativity is the special case where mass doesn’t change spacetime. I need a basic understanding of the general case where mass does change spacetime, because it is the mass of the Sun - through its influence on spacetime - that causes starlight to bend in the eclipse experiment. In spacetime, objects that are free from other forces move in straight lines. The main idea of general relativity is that mass causes spacetime to curve. If an object moves in a straight line in spacetime, and the spacetime through which it moves is curved, then the path of the object from a distant perspective will appear curved. The classic analogy, considering the curvature of space only, is travel on the surface of the Earth. Someone walking south to north along a meridian is walking in a straight line from their point of view. From the perspective of someone out in space, the walker is following a curved path.

While it is proper to recognise spacetime as a unified quantity, it is helpful to contemplate time and space separately when following the progression of predictions for the eclipse experiment outcome. First, consider time and its curvature, then space and its curvature.

In 1911, Einstein had the time part understood. The time part arises from the equivalence principle, one of Einstein's aha moments, which equates the experience and physical laws within a uniform acceleration to those within a uniform gravitational field of equal magnitude. Richard Feynman, Nobel Laureate in 1965, used a thought experiment involving a rocket to demonstrate an implication of the equivalence principle on time (Gottlieb and Pfeiffer, 2013).

Imagine you and I are in a rocket in deep space accelerating "upward." I'm at the top and you're at the bottom of the rocket. We both have clocks and lasers. Every time a second passes on my clock, I send a laser pulse down towards you. Because the rocket is accelerating upward, you receive my pulses faster than the seconds pass on your clock. If you forget that the rocket is accelerating, you'd think that time up where I am must be moving faster than it is down where you are. Now you send a laser pulse up toward me every time a second passes on your clock. Because the rocket is accelerating upward, I receive your pulses slower than the seconds pass on my clock. If I forget that the rocket is accelerating, I'd think that time down where you are must be moving slower than it is up where I am.

The equivalence principle says that the experience I just described must be the same if, instead of accelerating in space, the rocket is parked on a planet where the acceleration due to gravity is equivalent. You would think that time moves faster up where I am, and I would think that time moves slower down where you are. The mass of the planet makes this so.

What does this mean for light waves passing by the sun? Take the perspective from outer space: since time slows down close to the massive sun, the speed of light appears to slow down. Arthur Eddington described the resulting effect like this (Eddington 1920):

“The wave-motion in a ray of light can be compared to a succession of long straight waves rolling onward in the sea. If the motion of the waves is slower at one end than the other, the whole wave-front must gradually slew round, and the direction in which it is rolling must change. In the sea this happens when one end of the wave reaches shallow water before the other, because the speed in shallow water is slower. It is well known that this causes waves proceeding diagonally across a bay to slew round and come in parallel to the shore the advanced end is delayed in the shallow water and waits for the other. In the same way when the light waves pass near the sun, the end nearest the sun has the smaller velocity and the wave-front slews round thus the course of the waves is bent.”

In 1911, considering the curvature of time alone, Einstein predicted that the amount by which “the course of the waves is bent” in the eclipse experiment, for light waves grazing the sun, would be 0.87 arcseconds, the same value calculated using Newton’s theory. This is not the correct answer. General relativity was not yet complete.

Mass causes space to curve too. We need to include the curvature of space piece in order to accurately predict the deflection angle in the eclipse experiment. The mass of the sun causes space nearby to stretch.

Here's an analogy to help visualise this. Imagine a bowling ball resting in the centre of a trampoline. The bowling ball stretches the trampoline. This is an imperfect comparison. The real way in which the space around a massive body like the sun is deformed is beyond my capacity of visualisation. Space doesn't actually stretch "down" as in the trampoline analogy, but space does indeed deform.

Now we can ask the same question we did before, when considering the curvature of time, but now for the curvature of space: What does this mean for light waves passing by the sun? Again, take the perspective from outer space, and pretend we don’t see the stretched space near the sun. The light is traveling over an elongated distance that we don’t see, and so to us it appears that the speed of the light slows down. More slowing means more slewing.

In 1915, Einstein's completed theory of general relativity had both parts: the curvature of time and of space due to mass. Using the completed theory, the total deflection angle of starlight in the eclipse experiment is calculated to be 1.75 arcseconds.

Eclipse Day

The morning of August 21, 2017, I'm at Richard Berry's Alpaca Meadows Observatory in Oregon, in a pasture of alpaca-mowed yellow grass. Cars are whizzing by on Highway 22 behind a row of Douglas firs. Last night eleven scientists and artists gathered in the ranch house on the other side of a dry creek, where Richard and Eleanor Berry hosted a cosy dinner. This morning I'm hovering around Jacob Sharkansky, Abraham Salazar, and the Tele Vue Genesis telescope and STT-8300M computer-controlled camera they will use to photograph the deflected positions of stars during totality.

Jacob and Abraham are students at Portland Community College. They are remarkable young men. Jacob is a shy 17-year-old earning his high school diploma from the community college while taking college-level classes. Abraham is a 33-year-old civil engineering major who worked ten years in construction and has a family with two kids, one a newborn. They both were inspired to perform the Modern Eddington Experiment in Toby Dittrich's physics class.

There isn't a cloud in the sky today. The team's major concern is the focus of the telescope, which depends on temperature. They have plenty of experience focusing on stars during the cool night, but none during the mid-morning of a warm August day. It will cool down some during totality still, the best focus setting is a bit of a guessing game.

The partial eclipse starts 72 minutes before totality. Ten minutes before totality, all the observers start finding their spots and conversing in muted voices. Shadows on the ground sharpen. Two minutes before totality, Richard gives the order: "Get to your stations." Jacob starts pacing around the small wood shed sheltering the computer connected to the camera. There are no cars driving on the highway now. Ten seconds before totality, Abraham removes the filter protecting the camera from the sunlight. I gasp at totality and utter something I can't - and probably don't want to - remember. I see, with my naked eye, two short red hairs on the rim of the sun. These must be solar prominences from the sun spots Richard pointed out prior to totality.

The telescope camera, automated by the computer, takes 2-degree by 1.5-degree photos at various exposure durations: 0.1, 0.6, 1.0, and 1.6 seconds. The goal is to see stars within a donut around the sun. Outside the donut, the starlight deflection due to the sun's gravity is too small to measure. Inside the donut, stars can't be seen through the brightness of the corona. Like the telescope focus, the ideal camera exposure duration is uncertain. The camera needs time to capture enough starlight to locate the center of each star, but not so much time that the corona washes out the starlight. Before totality ends, the telescope turns away and photographs a group of star positions uninfluenced by the sun's gravity (this is the eclipse reference image).

I see a diamond ring, and totality is over. It could not have lasted long enough! The Modern Eddington Experiment team is elated. Jacob is striding laps around all the equipment in the pasture, grinning. The team captured 23 images of stars around the blocked sun. The data collection phase of the experiment is complete. We all stand in a row and shoot photos of the exhilarated trio and their telescope. The men are relieved at having executed the procedure they had rehearsed over the last three months. Now comes the challenging work of analysing the data.

More Troubleshooting For Dark iPhone Displays

1. Try Turning Off Auto-Brightness

Your iPhone has an Auto-Brightness setting automatically adjusts the brightness of the screen to give you the most ideal level based on surrounding light. Sometimes this setting can be a bit unhelpful as it’ll adjust the brightness to a level that’s too bright or too dark.

To turn off Auto-Brightness, open Settings and tap Accessibility -> Display & Text Size and turn off the switch next to Auto-Brightness.

Keep in mind that turning off Auto-Brightness can make your iPhone’s battery drain faster. If you plan to turn off Auto-Brightness anyway, check out our other article for several iPhone battery-saving tips.

2. Make Sure Zoom Isn’t On

If you recently used the Zoom feature in Settings -> Accessibility -> Zoom and left it on accidentally, it may be the reason why your iPhone screen is too dark! Using the Zoom setting, you can actually make the iPhone display darker than you’re able to with the Brightness slider.

3. Reset All Settings

If your iPhone’s screen is still too dim, go to Settings -> General -> Reset -> Reset All Settings to eliminate the possibility that something in the Settings app is causing your iPhone’s screen to be too dark.

This reset restores everything in the Settings app to the factory defaults. It’ll be as if you were opening the app for the very first time. You’ll have to set up your wallpaper again, reconnect your Bluetooth devices, reenter your Wi-Fi passwords, and more.

4. DFU Restore Your iPhone

A DFU restore is the deepest kind of restore you can do on an iPhone. If your iPhone’s screen is still too dark, a DFU restore is the last troubleshooting step you can take before exploring repair options. This special type of restore wipes both software and hardware settings, so make sure to back up your iPhone, and then follow our DFU restore guide to give it a try.

About Author

I'm Andrew Kunesh, a technology writer and IT professional from Chicago. My goal is to help you fix the many errors and problems your Apple devices may face. Thanks for checking out our work!

Watch the video: How to Fix Your Vision In Only 5 Minutes! Follow Along (June 2022).


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