are cataracts only age related?
may be present at birth, may develop anytime
may be age related (lens water loss and fiber compaction)
or caused by trauma (penetrating eye injury, intraocular forein bodies, radiation exposure) or exposure to toxic agents (corticosteroids, moitic agents, phenothiazine derivatives)
may occur with other disease or ocular disorders (dm, hypoparathyroidism, downs, chronic sunlight exposure)