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Causes of visual impairment


 Low or blurred vision is often caused by a refractive error such as nearsightedness, farsightedness, or astigmatism. Refractive errors occur when the eye is unable to focus light directly onto the retina. The refractive error you experience depends on the anatomical defect in your eye, which is related to the tissue of your cornea.

What causes poor eyesight

Eye diseases are a common cause of poor eyesight, and the most prominent of these diseases are the following:

- eye lens darkening.

- macular degeneration

- Optic nerve atrophy due to diabetes.

- glaucoma

- Retinitis.

- photosensitivity

- heredity. Eye injuries.

Types of visual impairment

- Nearsightedness

It occurs as a result of images being focused in front of the retina rather than on it, so distant objects appear blurred.

- Farsightedness

​It is the opposite of nearsightedness, in which the eye focuses images slightly behind the retina, making nearby objects appear blurred. Children may outgrow farsightedness as they mature.

- Presbyopia

Presbyopia is the blurring of vision in people who have a deficit in the focusing power of the eye, so that their vision becomes unable to read.

Presbyopia begins around age 40, which is why most seniors rely on reading glasses. Bifocal glasses allow wearers to see things clearly and up close.

The effect of low vision on daily life if the patient is a child

Children with low vision often suffer from the following:

- Difficulty learning concepts and often need intensive training from a very early age.

- Difficulty playing with children of the same age.

- Difficulty in adapting to the children of their generation in school.

Children with low vision need social support and socialization with other children and adults, and this support is the responsibility of parents and educators at school.

The effect of low vision on daily life if the patient is an adult

- Low vision is more common in adults and the elderly, and this weakness can be very traumatic for them and lead to all of the following:

- Frustration and depression.

- Loss of ability to drive.

- Loss of ability to read quickly.

- Exposure to social and physical isolation.

- Difficulty walking independently on the street to relieve necessities and shop.

- Difficulty finding work.

Treatment of low vision

In the event of suffering from visual impairment that hinders daily performance and deprives the person of enjoying life, the following steps are strongly required of him:

- Go to the specialized ophthalmologist and get a comprehensive eye examination.

Determine the appropriate treatment, and if the visual impairment cannot be fixed by glasses or contact lenses, it can be the first sign of a serious disease in the eyes, such as: macular degeneration, glaucoma or retinitis, as well as this may be a sign of the development of cataracts and must be Perform eye surgery to solve the problem.

It is worth noting that ophthalmologists send the patient to a nearsightedness specialist, who can do all of the following:

- Measure the extent of vision loss and determine the cause of this weakness. 

- Giving a prescription for assistive devices, such as: special magnifying lenses suitable for different uses.

The best way to keep your vision steady or restore your eyesight is to follow expert advice by eating healthy foods that provide all the nutrients your body and eyes need. Relaxing and taking breaks from TV, computer and smartphone screens is very important. The ophthalmologist should be reviewed regularly, taking care to wear sunglasses during the day and to quit smoking completely. Experts note that these methods and precautions may not stop changes in visual acuity, but will ultimately maintain better health of the eyes and the rest of the body.

Jane English, or as she is known on social media (Education English), Journalist. I graduated from Memorial University in Journalism. She writes in several fields: work - entertainment - sports - health - science She currently lives in the Middle East, Egypt, and works on creating educational content for the English language