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Cataract is a cloudiness in the lens of the eye that causes visual impairment.


In many cases, the cause is unknown. Cataracts usually occur in old age and could be lowered. Cataract formation accelerated by environmental factors, such as smoking or other toxic materials.

# Cataracts may be caused by eye injury
# Metabolic disease (eg diabetes)
# Certain medications (eg corticosteroids).

Cataracts cataract kongenitalis is found in babies at birth (or some time later). Kongenitalis Cataracts can be a hereditary disease (inherited in an autosomal dominant) or can be caused by:
- Congenital infections, such as German measles
- Dealing with metabolic diseases, such as galaktosemia.
Risk factors of cataract kongenitalis are:
- Inherited metabolic diseases
- History of cataract in the family
- Viral infection of the mother when the baby is still in the womb.

Cataracts in adults is usually associated with aging.
Cataracts in adults are grouped into:

1. Immatur cataracts: lens still has a clear section
2. Mature cataracts: lens is completely opaque
3. Cataracts hipermatur: there are parts of the lens surface that has seeped through the lens capsule and can cause inflammation of other eye structures.

Most of the lens a bit murky after the age of 60 year. Half patients who experienced similar changes in both eyes, although changes in one eye may be worse than other.A lot of eye cataract patients who experienced only a mild visual impairment and did not realize that they suffering from cataracts.

Factors that influence the occurrence of cataracts are:
- Levels of low blood calcium
- Diabetes
- Long-term use of corticosteroids
- Various inflammatory diseases and metabolic diseases.
- Environmental factors (trauma, radiation, ultraviolet light).

All rays entering the eye must first pass through the lens. Therefore, every part lenses that block, deflect or scatter the light can cause vision problems penglihatan.Beratnya depends on the location and maturity of the cataract.

Cataracts develop slowly and do not cause pain accompanied by vision problems that arise in stages. Visual impairment can be:
- Difficulty seeing at night
- See the circle around the light or the light was blinding my eyes
- Decrease in sharpness of vision (even during the day).
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