When you use your eyes at close range for a long time, your eyes are in a state of high tension adjustment. Over time, myopia will occur, which is what we call pseudomyopia.
Pseudomyopia is mainly caused by excessive use of eyes, which leads to continuous contraction and spasm of ciliary muscles. When turning to hyperopia, the lens can't relax and adjust, which makes the lens return to the flat state, leading to far-focus imaging in front of the retina, and the hyperopia is reduced, which is manifested as myopia.
If pseudomyopia is not found and solved in time, the lens of the eye will lose its ability of automatic adjustment. In order to see the near target clearly, the retina will actively extend its growth backward to the "focus", which will lead to irreversible changes in the biological structure of the eye and abnormal growth of the axial length, forming true myopia.
Ciliary muscle paralysis method: it is to relax and adjust the ciliary muscle with ciliary muscle paralysis medicine, so that the eyes are in a static refractive state, and then check the vision and make sure by optometry. Use 1% atropine eye drops, 1~2 times a day for 3~4 days; Or 2% homatropine or 0.5% atropine amide every 5 ~ 65438 05 minutes/kloc-0 * * 6 times. Check the naked eye vision under pinhole microscope before and after dropping eyes. If the vision does not become true myopia after mydriasis, the vision will increase to pseudomyopia. It is true to optometry with myopia diopter, but it is false without myopia diopter. This is recognized as the most reliable differential diagnosis method.
Does watching 3D movies affect children's eyesight?
3D movies form parallax through binocular separation, resulting in a sense of depth. Because people's eyes are located on the left and right sides of the nasal root, binocular parallax always exists in daily life as long as they have normal binocular vision. Because of this, people can distinguish the depth of the scene in front of them, that is, they can have stereoscopic vision.
In addition to binocular separation, 3D movies are no different from ordinary movies in other visual stimuli. Therefore, taking children to watch 3D movies will not have a bad influence on their eyesight.
Babies love to shed tears and have more chewing gum. What should I do?
Generally speaking, the baby within 6 months has increased tears and secretions without any warning, which is probably caused by the blockage of nasolacrimal duct.
For babies at this stage, their nasolacrimal duct is immature and often unobstructed, which leads to excessive tears not flowing into the nasal cavity through the nasolacrimal duct in time.
In this case, surgery is usually not needed. As the baby's nasolacrimal duct matures, most of this phenomenon will gradually disappear after the baby 1 year old.
In order to avoid secondary infection, parents need to clean the baby's eye secretions in time: they can use cotton swabs, wet cotton balls, gauze or soft towels to dip in physiological saline and wipe the eye secretions from the tip of the nose. After removing eye secretions, gently massage the part between the nose and the alar with one finger, and massage from the nose to the corner of the eye.
But if the baby's eye secretions increase, it is yellow-green; White eyes and redness, etc., need to take the baby to see a doctor in time.
What can you eat to prevent children from myopia?
Calcium food
Calcium is a mineral element that we are familiar with and attach great importance to. Medical experts point out that calcium deficiency is one of the important reasons for poor eyesight and even myopia. Foods containing calcium include: milk, bean products, fish and shrimp, animal bones, etc. We should also pay attention to foods rich in vitamin D such as animal liver, egg yolk and green vegetables to increase the absorption and utilization of calcium.
Chromium-containing food
Chromium is also an essential mineral element for human body, and its role in eyeball development is to keep its osmotic pressure balanced, otherwise it will cause the lens to bulge and become convex, which will increase the diopter of the eye and become myopia. According to experts' calculations, children need about 50-200 micrograms of chromium every day. Chromium-containing foods include grains, meat, cheese and egg yolk. Therefore, children should arrange more.
Hard food
Often give children some hard food to increase the frequency and intensity of oral tension, which can promote the development of children's vision. This is because mouth strain can increase the strength of facial muscles, including eye muscles, and make them have strong ability to adjust lenses and avoid myopia. Hard foods suitable for children are carrots, fruits, cabbage, animal bones, beans and so on. These foods are very hard and nutritious, and they are especially recommended.
How to judge whether the baby's vision is normal?
Observe children's daily performance carefully.
The common eye diseases of infants are manifested in many aspects: eye position (strabismus), eyelid (inverted eyelashes), vision problems (myopia, hyperopia, astigmatism), ptosis, microphthalmia, short ptosis, lacrimal system problems and so on. Most of them can be seen from the daily performance of children.
Periodic inspection
Some eye diseases can be seen from the external manifestations, but there are also some internal problems of the eyeball, such as fundus retinal dysplasia, retinopathy, congenital cataract and so on.
We suggest that parents take their children to have their eyes examined regularly to monitor their health. Generally speaking, within one year old, you need to check it four times, namely, 3 months, 6 months, 9 months, 12 months, and then check it once every six months.
Create a visual function file
If the baby is over two years old, you can go to the eye hospital or outpatient clinic according to the local medical conditions, establish a "visual function file", keep track of eye development, and find possible eye problems as soon as possible.