The light adapts to the time of the eye, why does the eye feel that it is impossible to see after be

Young man, don't you know how to ask questions modestly? The netizens here are not responsible for your problems, the capable ones are purely enthusiastic and voluntary, please respect the labor of others and learn to be a man.

The anonymous netizen upstairs is actually an old-timer who has been doing ENT for decades, I think he is right, you don't understand, why do you say that others are copying? Your attitude will not have your problem.

Everyone's adaptation process is different, so there's really no way to give you a specific answer.

In dark places, the photoreceptor cells of the eye are more sensitive to light! If you look at the light for a long time, your eyes will automatically adapt to that brightness, and when you suddenly change the brightness of the environment, your eyes will not adapt to the darkness so quickly! Playing with mobile phones at night is very harmful to the eyes, so it is recommended to adjust the backlight to the darkest and don't play often!

It is recommended that LZ wear lenses with a full line of sight.

It is a lens for daily wear, but it automatically adjusts the color of the lens according to the intensity of the UV rays, and is transparent indoors and turns brown or gray outdoors. The poor skin can also effectively block ultraviolet rays and reduce glare, which is a good eyeglass lens that burns skin.

However, it is still recommended that LZ go to a professional ophthalmologist for examination and receive professional **.

As for how much the human eye can bear.

First of all, a lumen is a unit of luminous flux, similar to the "total power" in electricity. The general light intensity is expressed in lux.

1 lux is equivalent to the intensity of light received by 1 lumen on an average area of 1 square meter.

For example, the laser pointer we usually use may not even have 1 lumen, but focusing on a small area will bring irreversible damage to the human eye. On the other hand, in the case of the sun, the amount of light emitted can no longer be calculated by the lumens level, but because the light is scattered, even if you look at it for a short time, it will not be anything.

Scientific studies have shown that the human eye can cause retinal damage if it stays in a space with an intensity of more than 2000 lux for a long time.

Reference: Example 1: Indoor lighting, 4 5 meters room, using 3 36W grille lamp 9 sets of average illumination Total luminous flux of light source CU mf area (2500 3 9) Lux Conclusion: The average illumination is more than 1000 lux.

Example 2: Stadium lighting, 20 40 meters field, using powrspot 1000w metal halide lamp 60 sets of average illuminance Total luminous flux of light source CU mf area (105000 60) lux conclusion: the average illumination is more than 1500lux and the vertical illumination is more than 1000lux (depending on the installation location).

In short, do not look directly at close range for a long time, as there should be no permanent damage to the eyes.

As for short-term dizziness or blindness, it depends on the specific intensity and what kind of environment the human eye is in.

Light in life – daylight, moonlight, roads, offices.

l Daylight. Direct sunlight (105lx), Cloudy (104lx); 15x108 cd/m2 ；Color temperature 6500 K

Moonlight. ;10 -4 cd/m2

Road. Main Roads: Over 20lx

Office. 500-800lx

The illumination of the ground is about 100000lx the illumination of the shade is about 10000lx the illumination near the north window of the indoor on a sunny day is about 2000lx the illumination of the indoor ** on a sunny day is about 200lx the illumination of the indoor corner is about 20lx the illumination of the indoor corner is about 20lx the outdoor 50-500lx on a cloudy day is 5-50lx the moonlight (full moon) 250lx the fluorescent lamp 5000lx the phosphor screen of the TV 100lx the illumination required when reading books and periodicals is 50 60lx Under 40W incandescent light, the illumination at a distance of 1m is about 30lx on a clear moonlit night, and the illumination is about dark night.

The visual cells used in dark light and bright light are different, and there is an adaptation phase in the transition between dark light and bright light.

Hello, everyone will be tired under the long-term exposure of the light, this is not your personal problem, the human body has the ability to automatically adjust, eye fatigue is to remind you that you need to give it a rest, I hope it can help you!

Looking at the computer for a long time hurts the eyes the most, pay attention to protection, don't look at the computer for too long, take a break from your eyes for an hour or so, often do eye exercises, buy some pure Chinese medicine eye drops, and use it when your eyes are particularly uncomfortable can improve eye fatigue. If you still can't improve your eye condition, it is recommended that you go to the hospital for a detailed examination.

People on earth are like this, it is recommended to reduce the time spent on the computer and go outdoors more.

Oh, I'm just like you, my eyes are getting sick now

It's okay for normal people to be like this.

In a dark place, the cone cells in the human eye are not working, and only the rod photoreceptor cells are working. There is a substance called rhodopsin in rod-shaped photoreceptor cells, which is sensitive to weak light, and it can be gradually synthesized in dark places, according to the statistics of ophthalmologists, 60% rhodopsin can be produced in 5 minutes in dark places, and all can be generated in about 30 minutes. Therefore, the longer you spend in a dark place, the more sensitive you are to low light.

However, some people have dysfunction of rod photoreceptor cells, in dark places, rod pigment cells can not work normally, no matter how long they stay in dark places, they cannot improve their sensitivity to low light, we call this phenomenon night blindness. Some night blindness is caused by vitamin A deficiency and other factors, and some are caused by diseases such as primary retinitis pigmentosa. Rod photoreceptors do not have the ability to recognize the color of objects, so seeing things in the dark is the same color.

Pay attention to eye hygiene, pay attention to everything, and go to the window to look at the green in the distance to relax your eyes at the appropriate time.

Prolonged dim light can lead to eye fatigue, and there will be a period of adaptation after reaching the area of strong light. The time and comfort of your eyes depends on the quality of your eyes.

Take a look at the Bates Fluid Jersey Strength Recovery Method, my previous one.