The encyclopedia of knowledge about eyes says that eyes are the windows of the soul, so we should take good care of our windows to prevent them from being blurred or damaged. Therefore, it is very necessary for us to understand the eyes. The following is an encyclopedia of knowledge about eyes. Hurry up and learn!
Knowledge of eyes 1 1. 10 eye favorite thing.
Eyes are very delicate, and it hurts when touched a little. Fortunately, the maintenance of eyes is very simple, and sometimes a blink of an eye is enough.
1, as far away from the screen as possible.
Mobile phone, tablet computer, etc. , are harmful to the eyes, a long time will lead to eye fatigue.
1.5 It is suggested that the distance between the eyes and the screen should be at least 5~6 times the diagonal length of the electronic screen. If you can't read the text clearly, you might as well enlarge the font.
2. blink more.
Blinking is the easiest way to keep your eyes moist, especially when reading books and watching the screen.
1.5 It is suggested to adopt the "20-20-20-20 principle", that is, blink continuously for 20 times every 20 minutes, keep your eyes off the screen for 20 seconds, look out 20 feet (about 6 meters) and relax your eyes.
3. Wear goggles when going out on sunny days.
Long-term exposure to ultraviolet rays will greatly increase the risk of eye diseases such as cataracts.
1.5 It is recommended to wear goggles when going out on sunny days, which can block 99% of ultraviolet rays.
Step 4 eat more deep-sea fish
Some experts said that eating marine fish can help prevent free radical damage and prevent eye diseases.
1.5 It is suggested that women who eat tuna, mackerel, salmon, sardines and other marine fish once a week have a lower risk of senile macular degeneration than other women by 42%.
Step 5 eat more dark green vegetables
Foods such as carrots are rich in beta carotene, which can be converted into vitamin A in the body, which is beneficial to eye health. However, according to research, the nutritional stars that are really beneficial to eye health are lutein and zeaxanthin.
1.5 It is recommended to eat more dark green leafy vegetables. Broccoli, zucchini and peas are rich in these two nutrients.
6. Give your eyes a day off every week.
1.5 It is recommended that people wearing contact lenses change their frame glasses at least once a week; Don't sleep with contact lenses; Wash your hands thoroughly before touching contact lenses; Contact lens care solution should be changed frequently.
Check your eyes once a year after 7.35 years old.
If you are over 35 years old, even if you are not nearsighted or farsighted, you should have your eyes examined once a year. If there is eye pain, redness or gradual decline in vision, you should seek medical attention in time.
1.5 It is suggested that people with hereditary eye diseases such as glaucoma or diabetes in their families should be more alert to eye changes.
8. Massage your eyes
Experts pointed out that staring at the computer and mobile phone display screen for a long time will make eye muscles tired, leading to poor blood flow and blurred vision.
1.5 It is suggested that you should pay attention to rest in time and do some eye massage every 30 minutes, which can improve your eyesight and make your eyes shine.
9. Wear goggles
Electronic products have flooded all aspects of life, work and study. In the process of use, the blue light emitted by electronic products will directly reach the fundus, causing damage to the macular area of the retina. Moreover, this damage is irreversible.
1.5 it is recommended to wear goggles when using electronic products, so as to reduce the harm of blue light of electronic products to eyes.
10, overlooking
When we look near from a distance (the target comes from within 5 meters), with the approach of the target, if the eyes want to image the emitted light reflected by the object within 5 meters on the retina, it is impossible to adjust a function only by the lens. At this time, three actions (convergence, adjustment and pupil contraction) will occur in both eyes: the rectus muscle of both eyes will contract at the same time, and the contraction of ciliary muscle will make the lens bulge, which will increase the diopter of the eyes accordingly, thus making the image outline of the object on the retina clear. Long-term close eye use leads to eye muscle tension, blood circulation disorder, insufficient blood supply and metabolic imbalance.
1.5 It is suggested to spend more time looking into the distance after work and study.
Second, 10 What hurts the eyes the most
The eyes are the most fragile organs of the human body. In life, there are many things that will do great harm to it. Knowing these dangers will help to prevent them before they happen and better protect your eyes.
1, go out without goggles.
Go out without sunglasses. Excessive ultraviolet radiation is easy to burn the cornea and even lead to many eye diseases such as cataracts.
Don't wash your face before going to bed
After running for a day, your face will be stained with a lot of dust and germs. If you don't wash your face before going to bed, it will easily lead to eye infection.
3. Total amount of eye drops
Some eye drops can temporarily constrict blood vessels and eliminate red-eye symptoms, but inflammation still exists. Repeated use of such eye drops will lead to redder eyes.
4. Ignore eye diseases
Many people think that flash, photophobia, pain, blurred vision or redness will naturally fade away. However, these may be signs of eye diseases from the body. Yicheng experts said that if ignored, it is easy to aggravate eye diseases, make vision difficult to recover and even have more serious consequences.
5. Too dry
Blowing, air drying, etc. It will accelerate the loss of water in the eyes and easily cause dry eyes.
Step 6 smoke
Smoking 20 cigarettes a day will double the risk of cataract. Smoking also increases the incidence of age-related macular degeneration and myopia. This is because the oxygen inhaled by the human body is consumed when smoking, which leads to the decrease of blood oxygen, and the retina is particularly sensitive to hypoxia, which will inevitably lead to great loss of vision and even blindness in serious cases.
7. Don't check your eyes
Even if you don't have myopia or presbyopia, you should develop the good habit of seeing an ophthalmologist regularly. Especially for patients with hypertension and diabetes, you should always check your eyes.
8. Wear contact lenses in the shower
Experts say, don't wear contact lenses when bathing or bathing, otherwise shampoo and shower gel will pollute the lenses and cause eye discomfort. In addition, in hot summer and windy spring, it is best to wear less contact lenses.
9. Swimming without goggles
When swimming, it is best to wear goggles to protect your eyes. Otherwise, dirty water is likely to damage the cornea.
10, staring at the computer for a long time.
Staring at the computer for a long time will make your eyes sour and aggravate myopia.
Knowledge of eyes 2 1, eyes = camera.
The eye can be compared to a camera. The lens of the eyeball is equivalent to the lens of the camera, the iris of the eyeball is equivalent to the aperture of the camera, the retina of the eyeball is equivalent to the film negative in the camera, and the choroid of the eyeball is equivalent to the wall of the camera darkroom. ......
2, amblyopia = raised two rabbits of different sizes.
Amblyopia refers to the situation that the binocular/monocular vision cannot reach 0.8 after correction!
"Amblyopia's two eyes are like two rabbits you keep together. One of them is strong and can eat, and the other is thin. When feeding every day, the strong rabbits always squeeze the thin rabbits to eat food. Over time, the stronger the rabbit, the healthier it is, while the thin rabbit is getting thinner and even dead! "
Therefore, the treatment of amblyopia, such as "covering therapy", is like reducing the food of "strong rabbits" and increasing the food of "thin rabbits". Only when they grow as big as usual can they grow up healthily together! Covering therapy is to force amblyopic eyes to watch, so that they can get exercise, gradually eliminate inhibition and improve their vision. )
3, cataract = there is fog on the glass, just wipe it off.
Cataract refers to an ophthalmic disease in which the lens in human eyes becomes turbid, leading to decreased vision and eventually blindness. For cataract, ophthalmologists may compare it like this: cataract is like a dirty window in a room, so that we can't see the outside indoors, while surgery to remove cataract means cleaning the foggy window and you can see it!
In cataract surgery, crystals can be compared to grapes. Tear a hole in the front grape skin (anterior capsule), emulsify and suck out the grape pulp (cortex and nucleus), keep the posterior skin (posterior capsule), and then implant the intraocular lens into this bag.
4, glaucoma = great lakes rise, it hurts if it doesn't work!
Glaucoma refers to the damage of optic nerve under high intraocular pressure or normal intraocular pressure!
For glaucoma, ophthalmologists compare it like this: the eyes of glaucoma are like a rising lake. If the water flow is not cleared quickly, the pressure of water can suppress the dam, which is a threat to eye safety.
5, laser myopia surgery = make a contact lens in the eye!
Patient: Doctor, what's the matter with laser surgery for myopia?
Doctor: The cornea is like a book, and the tissue in the cornea is the inside page of the book. When doing laser surgery, it is to lift the skin of the book, take out a few pages, and then cover the skin of the book, and the book will return to normal. "Uncovering the book cover" is the process of making corneal flap, and "taking away the inner page" is the process of laser cutting cornea. When the corneal flap is reset (the outer page of the book is restored), the gap left by laser cutting corneal tissue will naturally form a pair of "contact lenses", which can easily correct myopia!
6, retinal detachment surgery-gardener planting, paste off the wall!
"Retinal detachment is like pulling flowers and trees. If it is found in time and replanted, it may survive, and even the flowering and fruiting will not be affected. If it is not timely, the function will be affected and even wither and die. "