Every year there are new contact lenses that become available; spherical, torics, and multifocals. This gives practitioners many options to find the best fit and visual options for our patients. Recently, a new option has become available. These lenses are the first of their kind. Acuvue Oasys with Transition Light Technology. These are the same Acuvue Oasys contacts we fit, same great fit, same great comfort, but with a photochromic filter.
Bicentric grinding, also known as slab-off, is used to correct vertical imbalance. Typically, slab- off can be used to correct vertical imbalance over 1.5 diopters. Bicentric grinding means we are creating two optical centers on a lens. ‘Bi’ meaning two, and ‘centric’ meaning center. Bicentric grinding or slab-off is used to neutralize an unwanted prismatic effect caused by unequal refractive errors. Slab-off can be either conventional or reverse. Conventional slab-off is added to the front surface, lower part of the lens, and reverse slab-off is added to the rear surface, lower part of the lens.