FRICTION STABILIZED CONTACT LENSES

摘要

A contact lens incorporating one or more surface modified zones on the anterior surface of the lens may be utilized to generate a friction driven rotational force when the upper and/or lower eyelids pass over the one or more regions during blinking. A small difference in the coefficient of friction between the modified and unmodified regions of the lens may result in an equivalent rotational force to that of a thickness gradient lens. This small difference in the coefficient of friction produces a means to orient and stabilize the contact lens on eye.

主权项

1. An ophthalmic device comprising:
a contact lens having an anterior surface and a posterior surface and requiring rotational stability on eye, the contact lens being formed from a lens material; and one or more surface modified zones incorporated at least one of into or onto the anterior surface of the contact lens, the one or more surface modified zones being configured to facilitate alignment, via rotation, of the contact lens on the eye at a rotational angle for optimal visual acuity, the one or more surface modified zones comprising a coefficient of friction greater than the remaining portion of the contact lens.