A hybrid contact lens offers the "best of both worlds" for everyday patients, as well as for patients with compromised corneas. These lenses deliver clear, crisp vision. The crisp vision comes from the GP (Gas Perm) center and the comfort comes from the soft material that surrounds the GP center.
Sceleral lenses have is a large diameter hard contact lens that covers the cornea and part of the white part of the eye called Sclera
Piggy back lenses/gas permeable lenses
Piggy Back- These lenses fit on top of a soft contact lens and they are used to improve your comfort while wearing contacts
Gas Permeable - These are hard contact lenses that floats on the cornea to provide a very crisp vision