Help docs! i'm trying to find out what causes poor eyesight in the elderly?

Many: Presbyopia is an- 'old age' changes in vision- usually people need glasses for reading. Other common conditions associated with aging are macular degeneration, that affects central vision, cataracts - that cause dim or discoloration of vision. Some diseases that are common in the elderly can also cause eye problems including diabetic retinopathy and hypertensive retinopathy.