Themedicoswale

Cataract is the opacity and cloudiness of lens and it is responsible for vision disability. Cataract is the leading cause of blindness worldwide. Classification:- There are three types of cataract  1. Traumatic 2. Congenital 3. Senile cataract Risk factors :- Cataract is depend on several factors for formation. 1. Age -loss of lens transparency due to increased age - increase in sodium and calcium levels - Decreased oxygen uptake - clumping and aggregation of lens protein - Decreased in level of vitamin c, protein and glutathione - accumulation of yellow brown pigment due to lens breakdown. 2. Ocular condition - infection - myopia  - Retinal detachment  -  Retinitis  3. Toxic factors - Alkaline chemical eye burns  - poision  - use of Aspirin - calcium , copper , iron , gold ,silver and Mercury  - cigarette smoking - ionising radiation - corticosteroid 4. Nutritional Factors - obesity - poor nutrition - Reduced levels of antioxidants 5. Physical Fa...