title: Use of a microelectromechanical mirror for adaptive optics in the human eye.
abstract: Ophthalmic instrumentation equipped with adaptive optics offers the possibility of rapid and automated correction of the eye's optics for improving vision and for improving images of the retina. One factor that limits the widespread implementation of adaptive optics is the cost of the wave-front corrector, such as a deformable mirror. In addition, the large apertures of these elements require high pupil magnification, and hence the systems tend to be physically large. We present what are believed to be the first closed-loop results when a compact, low-cost, surface micromachined, microelectromechanical mirror is used in a vision adaptive-optics system. The correction performance of the mirror is shown to be comparable to that of a Xinetics mirror for a 4.6-mm pupil size. Furthermore, for a pupil diameter of 6.0-mm, the residual rms error is reduced from 0.36 to 0.12 microm and individual photoreceptors are resolved at a pupil eccentricity of 1 degrees from the fovea.
authors.forename: Nathan
authors.initials: N
authors.lastname: Doble
authors.forename: Geunyoung
authors.initials: G
authors.lastname: Yoon
authors.forename: Li
authors.initials: L
authors.lastname: Chen
authors.forename: Paul
authors.initials: P
authors.lastname: Bierden
authors.forename: Ben
authors.initials: B
authors.lastname: Singer
authors.forename: Scott
authors.initials: S
authors.lastname: Olivier
authors.forename: David R
authors.initials: DR
authors.lastname: Williams