Swimming eyeglasses are sport eyeglasses, which prevent that water reaches the eyes. Thus eye irritations are prevented for example by gechlortes swimming pool water. Also seeing under water becomes so more comfortable. Usable they are general when swimming, Wasserball, Canoyning, snorkels, for etc. - with kinds of water haven. The advantage of swimming eyeglasses is that when swimming by the nose it can be breathed out which leads to the fact that e.g. when back swimming no water into the respiratory organ arrived (into a Tauchmaske became when swimming by the current water in-arrive). In addition the resistance is smaller than with diver eyeglasses. I don’t have any experience of buying such swimming eyeglasses, so which kind of coating is the most suitable?