Optrex Refreshing Eye Drops for tired eyes refresh, soothe and cleanse tired and uncomfortable eyes. A busy work schedule, regular computer use, contact lenses, travelling, centrally heated environments and even make-up are just some of the things that can take a toll on your eyes, leaving them tired, uncomfortable and irritated. Optrex Refreshing Eye Drops for tired eyes are specially formulated to help combat the effects of modern living. Because they contain natural plant extracts and are balanced at the natural pH of tears the drops are gentle and sensitive enough for every day use.