Cataracts and other eye problems are directly linked to UV exposure. Wearing sunglasses can help a lot, but has a few shortcomings - some UV rays can still enter the eyes from the sides and from reflection on the back side of the lenses; water drops can impair vision; and on partly sunny days, sunglasses can simply be annoying. I did wear either prescription sunglasses or (on cloudy days) non-tinted polycarbonate glasses almost every single day I windsurfed since last year; but my lovely wife often finds sunglasses too bothersome, and sometimes sails unprotected on cloudy and partly sunny days.
|Nina speeding on a cloudy day|
I have always found contact lenses much more convenient for windsurfing, and used daily disposables for years, so I'm happy to report that I am back to using contacts. But this time around, I went for UV absorbing contact lenses - specifically, Acuvue Oasys 1-Day lenses. They absorb more than 90% of UVA and 99% of UVB, making them the best UV absorbing lenses I could find. Some other contact lenses also have good to very good UV absorption, but most lenses do not - including the ones I had used until last year. I plan to also wear sunglasses on sunny days, and polycarbonate safety glasses on cloudy days; on partially cloudy days, UV exposure can actually be even higher than on sunny days. So far, the protection seems to be working - at this year's eye doctor follow-up, the cataracts seems unchanged relative to last year (after appearing suddenly within the 2 years before that).
So, if you are wearing contacts while windsurfing, double-check that they offer UV protection. If not, talk to your eye doctor about getting a different kind for windsurfing. If you prefer to use glasses, I can recommend the sports frames from Zenni.com. They are not pretty, but have worked well for me for more than 100 sessions so far, and you can get a pair of polarized prescription sunglasses for about $110.