If you are looking for a mask that has been in a product line for years and has proven itself to be a universal and quality mask then look no further. The Focus is the traditional battle horse of the Cressi range and one of the most popular masks in the world. It is one of the first dive mask with inclined glasses, a patented technology of Cressi. Prescription lenses for this mask are only available for near sighted (negative prescriptions). Please be sure to double check your prescription in order to ensure you get the appropriate lenses!