The eyes act as the gateway between imaginations and reality. They serve as the organs that sense and judge everything happening around us.

The functions of the eyes are not just limited to sight alone. The eyes also help us to maintain body balance or posture. This is appreciated more when we try to make some moves with our eyes closed, or when there's a problem with one or both eyes.

The common eye defects or diseases include:

Cataract

As we age, some illnesses invade our body due to the way the entire body processes reduce their efficiency, one one such complication from reduction in visual acuity is cataract.

Cataract is a disease commonly caused by old age, mostly from age 65 above. If you have cataracts, your eye lenses become cloudy, vision becomes blurry and worsen as time goes on.

Night Blindness 

Night blindness is medically called Nyctalopia. It's a complication from retina defect caused by deficiency of vitamin A. People with Night blindness have difficulty in seeing at night or through poor light sources. 

The black spot in the middle of the eyes ( the pupil) controls the amount of light reaching the retina by adjusting its size according to the quantity of light coming into the eyes; this enables us to see in dim light and in broad daylight. 

Anything that affects the pupils will affect accommodation, night blindness is caused by Pupil damage, cataract, myopia, or sometimes by the prolonged use of certain medications for eye treatment.

Lazy Eye

This eye defect is also called amblyopia. It is characterized by reduced visual acuity in one two the two eyes. Visual signals from the weaker or affected eye may not be interpreted by the brain. 

Amblyopia occurs mostly at the tender ages of childhood. If left untreated, it can result to a permanent eye defect.

There is no clear knowledge of what causes lazy eye, although people at risk of suffering it include infants born prematurely, heredity, or diseases occurring during pregnancy.

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https://www.rekodex.com/2022/08/6-common-eye-problems-or-infections-and.html