OTG means Over the Glasses which are made to fit over your prescription glasses or readers for convenient sun-protection. If you have to wear optical glasses, over-the-glasses goggles are the best option to protect your eyes from UV ray and keep your vision clear when you are doing outdoor sports.

Polycarbonate is the material favored by most sports eyewear manufacturers because it's very light and shatterproof, which is an impressive impact resistant lens. Being flexible is what enables it to absorb energy without fracturing. Polycarbonate lenses are more impact-resistant than plastic or glass lenses. PC lens provide a very high degree of eye protection.