Cataracts are when the lens, a small transparent disc inside your eye, develops cloudy patches. Over time these patches usually become bigger causing blurry, misty vision and eventually blindness.
When we're young, our lenses are usually like clear glass, allowing us to see through them. As we get older, they start to become frosted, like bathroom glass, and begin to limit our vision.
Cataracts usually appear in both eyes. They may not necessarily develop at the same time or be the same in each eye. They're more common in older adults and can affect your ability to carry out daily activities such as driving.
Your optician will do a series of eye tests, including a visual acuity exam, which measures how well you see at various distances. If your optician thinks you have cataracts, you may be referred to an eye specialist (ophthalmologist) for more tests and treatment.
If your cataracts are not too bad, stronger glasses and brighter reading lights may help for a while.
For more information about cataracts the NHS website has lots of useful information, guidance and support.
Image taken from piedmonteye.com