I am 54 years old and have a maturing cataract in my left eye and the start of one in my right eye. The reason? Excessive sun exposure because my eyeglass lenses are too thick for clip-ons to work and I can't stand the sunglasses that go over your eyeglasses. I've never been able to afford prescription sunglasses. Not when my glasses cost 500 dollars and up due to a weird bifocal RX. I just went to the eye doctor for a checkup and to see if the cataracts are what is affecting my night vision. They are and they're not bad enough to have removed yet. However, you can now get glasses with UVA/UVB (the rays that cause cataracts) protection. I ordered a pair with photo-reactive lenses and the UV protection. Cost me a fortune as I have to have high quality frames to be able to carry the left lens. Please, don't play games with your eyes. Wear lenses with UVA/UVB protection. They cost more, but they beat losing your vision gradually which is what is happening to me.