Hard oxygen permeable lenses
Hard oxygen permeable contact lenses no longer really feel hard, contrary to the name. This is due to the improved "comfort design" of the contact lens, which makes the lens follow the shape of the eye better and makes the contact lens float on the eye's tear fluid. To achieve this "floating effect", it is important that the contact lens fits your cornea optimally "to hundredths of millimetres". The fitting of hard oxygen permeable contact lenses is therefore truly custom-made.
Hard oxygen permeable contact lenses are ideal for correcting cylinder strengths. Nowadays, there are even multifocal hard oxygen permeable contact lenses (with distance and after-sight for the over-40s).