Apparently, there is no way to prevent cataracts. But you can minimize the probability or can delay the problem if you take the following preventive measures. As the UVB rays are harmful to the skin, the same is for the eyes as well. Try to wear specific sunglasses to protect your ever from UVB rays. Regular eye check-up is very important, especially if you face eye issues or are above the age of 40 or 50. Smoking is injurious in multiple ways. Even it put a direct effect on your eyes. So, maintaining a healthy lifestyle and eating healthy food such as fruits, green vegetables, antioxidants is very necessary.  If you are an obese person, try to check your weight quickly as it can advance your cataract problem. Same for diabetic patients as it is very much harmful not only for the body but also for your eyes.