Why do glasses correct vision? What is Corrected Vision?

Myopia is mainly due to blurred retinal imaging due to distant parallel light rays focusing on the retina in front of it. Myopia lenses move the focus back onto the retina, creating a clear image. The myopic eye does not need or less adjustment when seeing near, but it needs to gather the two eyes inward, and the adjustment and collection are natural reflexes, and visual fatigue is easy to occur when the difference is large.

Myopia lenses can make the adjustment and set match each other, and it is not easy to have eye fatigue. In the past, the simple way of saying it was that when you couldn't see clearly, you would definitely squint, which would further lead to eye fatigue, which would increase the rate and risk of myopia growth, so it was recommended to wear glasses all day long above 300 degrees. There are glasses that allow you to transition from blurred vision to clear vision, the human brain wants to see things clearly, if blurred, the brain will also be very tired, from the perspective of seeking advantages and avoiding disadvantages, it is necessary for human beings to see clearly, so glasses should be long.

There are two types of lenses for correcting vision: concave lenses for correcting myopia and convex lenses for correcting farsightedness. When a myopic patient sees something, the image falls in front of the retina, and the divergence of light by the concave lens can move the image back to the retina, so that the patient can see things in the distance clearly.

When a hyperopic patient sees something, the image falls behind the retina, and the convex lens has a converging effect on the light, which can advance the image to the retina, so that the hyperopic patient can see things that are close to him. Even if you wear glasses with a higher number, you can't see clearly, and I've seen an old lady who hasn't been with glasses in her life, and the first time she came to check it, it was 2000 degrees, which was related to the failure to correct it in time. And why wear glasses all the time.

Corrected visual acuity is the actual visual acuity compared to uncorrected visual acuity, and corrected visual acuity is the visual acuity obtained after the refractive error is corrected with glasses.

If there is a vision problem in the eye, in addition to wearing glasses to correct it, it is generally necessary to pay attention to:

1. Pay attention to the time you spend with your eyes.

Children's eye development is not perfect, the ability to work is low, every time you read or write for an hour, you should let the child go to outdoor activities, do games, look into the distance, or observe the flowers and trees, so that the tense eye muscles are relaxed, eliminate fatigue. In addition, it is necessary to make the child's life regular, have enough sleep, and let the eyes get enough rest.

2. Pay attention to the light of your eyes.

Do not allow your child to read or write in dark light or sunlight. If a 25-watt light bulb is used indoors at night, the distance between the book and the bulb should be within 1 meter. If you use a 60-watt bulb on a stool, the distance between the book and the bulb should be 1 2 meters.

Cloudy days, dusk, weak light in the moonlight, and strong light in the sun are not suitable for reading and writing. When watching TV, it is necessary to maintain a suitable distance, which should generally be 5 7 times the diagonal length of the phosphor screen. The time to watch TV should not exceed 2 hours at a time.

3. Pay attention to eye exercise.

Physical exercise can enhance blood circulation and metabolism, supply more nutrients to the eyes, and enhance the resistance of the eyes, which is an indirect exercise for the eyes. The direct exercise is eye exercises, which is based on the massage, massage, acupuncture and acupuncture acupuncture points of Chinese medicine, combined with jujube Kuanhui medical sports, which is a scientific method to protect eyesight. Parents should learn the basic knowledge of eye exercises, give specific guidance and often urge their children to do eye exercises, and persevere.

4. Pay attention to eye nutrition.

In order to protect children's eyes, children can eat more carrots, animal liver, lean meat, to supplement vitamin A, or regularly supplement the comprehensive nutrition of the eyes with Leyan vision nutrients, and at the same time, it is also necessary to appropriately consume millet, tofu, animal liver and other supplements of vitamin B2, so as to avoid night blindness, corneal malacia, red eyes, dry itching and other symptoms. Eating too much sugar will harm your child's eyesight, so your child's sugar intake should be controlled.

5. Pay attention to regular inspections.

Regular check-ups are due to the fact that children's eye structure, binocular visual function, and intelligence are still in the process of continuous development after birth, and the content of the examination is different at different ages. The usual age of ophthalmologic examination is generally 2-7 days after birth, 42 days after birth, 3 months, 6 months, and 1 year of age, and then once a year. In this way, the problem can be detected early and corrected early, instead of waiting until the vision has deteriorated and there is a vision problem before going for a check-up.

Corrected vision refers to the vision obtained by wearing glasses or other means to correct refractive errors.

The general standard for visual acuity in the physical examination of civil servants is that the corrected visual acuity of both eyes is lower than the decimal visual acuity, the corrected visual acuity of the other eye is lower than the decimal visual acuity, and those who are blind in one eye and the other eye are less than the decimal visual acuity.

Corrected visual acuity is generally used for people with refractive error compared to uncorrected visual acuity. Uncorrected vision is your actual vision, and corrected vision is the vision that is obtained after correcting the refractive error with glasses.

In other words, corrected vision is the vision after wearing glasses. Visual acuity measured without glasses is called unaided visual acuity. For example, if a person with myopia does not have vision without glasses, but the vision is achieved after wearing glasses, the former is called uncorrected vision, and the vision after wearing glasses is called corrected vision.

Some people think that the meaning of "correction" means that the vision will be restored (corrected) after wearing glasses, such as the above-mentioned myopic eye is "corrected" by wearing glasses, and the vision will be corrected without glasses in the future, but this is not the understanding!

Generally, children under the age of 18 are nearsighted, because the eyeball is highly accommodative at this time, and their vision can be improved through drugs. It is recommended to use Le Jing nutrients to treat I therapy, take it with warm water 2 times a day, and insist on using it to slowly reduce the degree of myopia and improve the naked eye.

Compared with uncorrected visual acuity, corrected visual acuity is generally more suitable for people with refractive errors (myopia, farsightedness, astigmatism). Uncorrected vision is your actual vision, while corrected vision is the vision that is obtained after glasses or surgery are used to correct the refractive error.

In general, corrected vision refers to vision after wearing glasses. Visual acuity measured without glasses is called unaided visual acuity. For example, if a patient with myopia does not have vision without glasses, and the vision is achieved with glasses, the former is called uncorrected vision, and the vision after wearing glasses is called corrected vision.

Some people think that the meaning of "correction" means that vision will be restored (corrected) after wearing glasses, for example, the above-mentioned myopic eye will be "corrected" by wearing glasses, and the vision will be corrected after not wearing glasses, but this is a wrong concept.