Cataracts
A cataract is a cloudiness that forms in the lens of the eye - the part that allows a focused image to be transmitted onto the retina. This cloudiness creates blurring, affecting both near and distance vision.
Cataracts generally result from the ageing process, though they can also develop from other causes such as congenital disability (from birth) or trauma to the eye.
Cataracts due to ageing usually develop slowly and affect both eyes at different rates. They are often successfully removed through surgery, including the insertion of intra-ocular lenses.
Functional implications of a cataract include:
- Having difficulty seeing traffic when crossing the road.
- Having difficulty driving.
- Seeing a halo or double vision around lights at night.
- Seeing images as if through a veil.
- Having difficulty reading.
- Being particularly sensitive to glare and light.
- Having dulled colour vision.
- Having difficulty judging depth.
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