Cataract (Cataract) is an eye disease causing blindness. Symptoms such as webbed eyepiece, cloudy, or turbid so that light can not enter, and blurred vision. If not treated quickly, cataracts can cause blindness.
Cataracts are caused by many things such as prolonged eye exposure to sunlight / ultravioloet or other radiation sources. Then diseases like diabetes, high blood pressure, old age, or physical trauma can also cause cataracts. Heredity / genetics also influences cataracts at an earlier age. to overcome the disease Cataract Cataract surgery is usually done.
Genetic factors are often a cause of congenital cataracts and positive family history may also play a role in predisposing someone to cataracts at an earlier age, the phenomenon of "anticipation" in pre-senile cataracts. Cataracts may also be produced by eye injury or physical trauma.
A study among Icelandair pilots showed commercial airline pilots are three times more likely to develop cataracts than people with non-flying jobs. It is thought to be caused by excessive exposure to radiation coming from outer space.
Cataracts are also unusually common in persons exposed to infrared radiation, such as glassblowers who suffer from "exfoliation syndrome". Exposure to microwave radiation can cause cataracts. Atopic or allergic conditions are also known to accelerate the development of cataracts, especially in children.
Cataracts can be partial or complete, stationary or progressive, hard or soft.
Some drugs can induce cataract development, such as corticosteroids and Ezetimibe and Seroquel.
There are various types of cataracts, eg nuclear, cortical, mature, and hypermature. Cataracts are also classified by their location, eg posterior (classically due to steroid use) and anterior (common (senile) cataract related to aging).
Associations with systemic conditions
chromosomal disorders
Alport syndrome
Cri-du-chat syndrome
Conradi Syndrome
myotonic dystrophy
Patau syndrome
Schmid-Fraccaro syndrome
Trisomy 18 (Edward's syndrome)
Turner syndrome
Skin and mucous membrane disease
atopic dermatitis
Basal cell nevus syndrome
ichthyosis
pemphigus
Metabolic and nutritional diseases
Aminoaciduria (Lowe syndrome)
diabetes mellitus
Fabry disease
Galactosemia / galactosemic cataract
homocystinuria
Hypervitaminosis D
hyperparathyroidism
Hypothyroidism
Mucopolysaccharidoses
Wilson disease
communicable disease
congenital
Herpes simplex Congenital
congenital syphilis
Cytomegalic inclusion disease
rubella
other
cysticercosis
leprosy
onchocerciasis
toxoplasmosis
Systemic toxic substances introduced
corticosteroids
haloperidol
Miotics
Triparanol
A cataract is an opacity that forms on the lens of the eye, initially making vision blurry or clouded. If left untreated, cataracts will cause blindness; in fact, they are the leading cause of blindness in the world. Cataract blindness can set in slowly, which is why it is important for people to get regular eye examinations to ensure that their eyes are healthy. Fortunately, blindness caused by cataracts can be treated, especially if it is caught early, and the surgery has a good success rate.