Contact Lenses Bifocal and Multifocal Contact Lenses If you need correction for presbyopia (over 40) but don't like the idea of bifocal eyeglasses, you have many contact lens options. Gas Permeable (GP) Contact Lenses These lenses offer the advantages of durability, crisp vision and high oxygen permeability. Contact Lenses for the "Hard-to-Fit" Patient Challenges such as astigmatism, presbyopia, keratoconus and dry eyes require more time and expertise, but there are certainly contact lense answers to all of these issues. Orthokeratology What if you could wear contacts while sleeping, and then see clearly during the day without them? It might sound like magic, but it’s a time-tested reality called ortho-k. Toric Contact Lenses for Astigmatism “I can’t wear soft contacts; I have astigmatism.” This once-true statement is now simply a myth.