Rigid gas permeable (RGP) corneal lenses have advantages for patients with high order wavefront aberrations, such as patients with keratoconus. The most significant problem with correcting optical aberrations with a contact lens is that the contact lens moves on the eye, and the motion of the lens causes additional aberrations. A second problem is that the eye is a dynamic system and the measured wavefronts over a period of time tend to differ due to effects such as pupil constriction, accommodation, and fixation. Previous studies have revealed that lens motion introduces a completely new section of the lens in front of the pupil, and one can expect the measured wavefront to be very different from the one measured before rotation.
The objective of this technology is to design advanced contact lenses that correct both lower and higher order visual aberrations in patients suffering from keratoconus, whose eyes are not correctable to their satisfaction by conventional rigid contact lenses. The method allows for advanced contact lenses than correct optical aberrations of a human eye despite lens motion due to blinks and eye movements. In particular, the method advances the current state of the art by measuring lens position and optical aberrations concurrently over a period of time, and uses the measurements to design an aberration-correcting lens that is optimal for the measured motion.
Reference Number: D-1285
Features, Benefits, & Advantages:
Correction of vision for patients with high order wavefront aberrations
Intellectual Property: A US provisional patent, serial number 62427616, was filed on 11/29/16.
Development Stage: The theory has been developed, and some prototype lenses have been made.
Ram Iyer, Mathematics and Statistics, Texas Tech University, Lubbock, Texas
Steven Mathews, Mathematics and Statistics, Texas Tech University, Lubbock, Texas
Keywords: lower and higher order aberrations, contact lens, cornea