Oxyopia Abstract

March 3, 2006
Friday, 4 PM
489 Minor Hall

Geunyoung Yoon, PhD
Assistant Professor of Ophthalmology, Biomedical Engineering, Center for Visual Science, University of Rochester
Host: Austin Roorda

Title

Vision improvement using wavefront technologies

Abstract

Although the human eye has a relatively simple optical system, it is not perfect. It has long been known that the eye suffers from lower order aberrations, defocus and astigmatism. These aberrations have been corrected effectively using conventional spectacles, contact lenses and laser refractive surgery. However, the higher order aberrations such as coma, trefoil and spherical aberration which can not be corrected with those conventional methods have the significant impact on visual performance especially when the eye’s pupil is relatively large. The impact of the higher order aberration is even more significant in eyes with keratoconus (cone-shaped abnormal cornea) or penetrating keratoplasty (corneal transplant). Accurate measurement and correction of these higher order aberrations could result in substantial improvement in vision.

Wavefront sensing technique allows us not only to better understand optics of the eye but also to make it possible to correct the aberration to improve visual performance. My talk focuses on ocular wavefront sensors and advanced aberration correction methods such as adaptive optics, customized optics and laser refractive surgery. Other ophthalmic applications of the wavefront technology such as tear film dynamics, optical testing, wavefront interaction and presbyopic correction are also introduced.

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