Every sport brings its own requirements for eyewear. These requirements can be broken down into two main areas: EYEWEAR FIT A sportsperson's sports sunglasses need to fit securely and comfortably, ensuring optimal performance in any situation. Each sport has its own requirements. Many sports are played all year round so its important to have a sunglass lens in your sport sunglasses that will cope with a wide variety of sunlight conditions (from low light to heavy sunshine) or to have interchangeable lenses. Whilst other sports are played on reflective surfaces such as water or snow where it is beneficial to have polarised lenses in your sports sunglasses to reduce the sun glare. EYEWEAR LENSES Knowing there is not one perfect lens for all sports, manufacturers have come up with interchangeable lens systems; with the majority of products coming as a sports sunglasses package with the frame and a dark sunglass lens with the option of purchasing numerous other colours as you require them. Such brands include OAKLEY, RUDY PROJECT, ADIDAS. PRESCRIPTION OPTIONS OPTICAL INSERT The insert clips onto the back of the sport sunglasses enabling you to still interchange the main sunglass' lenses for different colours. As the insert can be removed this concept is also great for contact lens wearers. Cosmetically you can often tell there is an insert behind the sunglasses which makes them not as pleasing for fashion prescription sunglasses but functionality-wise ideal for sport. DIRECT GLAZE This is where your prescription is fitted into the glasses frame. Two brands that excel are Oakley sunglasses and Maui Jim sunglasses, both manufacturing wrap-around prescription lenses tailored to your requirements.