Cataracts are normally an age related issue.   In cataracts, the crystalline lens, which sits just behind your pupil, becomes opaque, normally the main cause is aging. However, as for most age related issues there are ways to slow down their progression.

Can I protect my eyes from cataracts?

UV exposure can speed up cataract development. So take precautions against harmful UV rays from the sun when outdoors. Wearing sunglasses with UV protection will help keep your eyes safe from damage caused by UV radiation exposure.  If you are going to be out in the sunlight for extended periods wear a wide-brimmed hat or cap to help shade your eyes.

Good nutrition also plays a role in controlling cataract.  The antioxidants in fruits and vegetables (such as spinach and blueberries) can prevent cataracts and other eye conditions. 

Remember regular checkups can help in the management of cataracts.