What Causes Central Vision Loss?

Vision loss is a phenomenon of high vision loss or loss of light perception. Both eyes lose the ability to recognize the environment and it is difficult to cook daily life alone, which is called blindness. There are single blindness and double blindness. Blind refers to people who are blind.

Vision loss

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Vision loss is a phenomenon of high vision loss or loss of light perception. Both eyes lose the ability to recognize the environment and it is difficult to cook daily life alone, which is called blindness. There are single blindness and double blindness. Blind refers to people who are blind.

nickname

blindness

Disease site

Eye

Inducement

infection

Multiple people

widely

In order to unify standards and facilitate statistics and comparison, the WHO formulated blind standards and classifications in 1972, which have been adopted by most countries. China decided to adopt this standard at the second National Ophthalmology Conference in 1979.

A person's ability to recognize the surrounding environment not only depends on the sharpness of his central vision, but also has a corresponding field of vision. If the central vision is good and the field of vision is reduced, the gaze point is the center, and the field of vision is less than 10 ° and greater than 5 °. Level 3, if the radius is less than 5 °, level 4.

According to the blindness criterion below 0.05, the prevalence of double-blindness in China is 0.3-0.4% on average, and there are about 3-4 million blind people in China. Vision is less than 0.3, and people with low vision who have difficulties in work and study are about 2 times as blind.

Cataracts, glaucoma, retinal detachment, and eye trauma are important causes of blindness. The main causes of low vision are senile cataract, trachoma, corneal disease, refractive error, amblyopia, and fundus disease.

To prevent the occurrence of blindness, we should first find out the blindness rate and the causes of blindness in different areas, and formulate short-term, medium-term and long-term goals and work plans; choose the area with the highest blindness rate, and investigate the blind people who can be treated while investigating. Give treatment and carry out preventive work; primary health workers in rural areas should be taught simple eye disease prevention and control; establish and strengthen the organization of the medical prevention network.

All infectious and traumatic eye diseases can be prevented. In recent years, for some congenital and hereditary eye diseases, during the embryonic period, the chromosomes of amniotic fluid cells can be examined to detect abnormalities at an early stage for the purpose of prevention. Premarital inspections should be strengthened, marriages between close relatives should be banned, and counseling agencies for genetic diseases should be established.