Cataract development is typified by:
- Reduction of vision
- Reduction in colour observation
- Sometimes double vision and increased sensitivity to light.
Cataract treatment is essential when visual acuteness has reduced to such an extent that daily use of the eyes has become difficult (e.g. for driving, watching television, reading, and such like).
The usual cause of cataract is old age, but it can be caused by trauma, medication, heat, and such like.