BOOK_CONTENT
From Adaptive Optics for Vision Science

Wavefront Sensing and Diagnostic Uses

GEUNYOUNG YOON
University of Rochester, Rochester, New York

3.1   WAVEFRONT SENSORS FOR THE EYE

Various wavefront sensing techniques have been developed for the human eye
[1–12]. Wavefront sensing is a key technique required to better understand
the optical quality of the eye and to develop advanced vision correction
methods, such as adaptive optics, customized contact lenses, and customized
laser refractive surgery. It is also a necessary technique for high-resolution
imaging of the retina. The most commonly used wavefront sensors are the
spatially resolved refractometer, the laser ray tracing technique, and the
Shack–Hartmann wavefront sensor. Wavefront sensors measure the aberrations
of the entire eye generated by both corneal surfaces and the crystalline
lens, whereas corneal topography can only measure the aberrations induced
by the anterior or both anterior and posterior corneal surfaces. Since wavefront
sensing light needs to pass through the cornea and crystalline lens, the
eye’s pupil is the absolute limiting aperture of wavefront sensing, which may
require pupil dilation. Wavefront sensing may be very difficult if parts of the
eye have opacities, such as cataracts and corneal scars.

Wavefront sensors can be categorized by whether the measurement is
based on a subjective or...


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Topics of Interest

Wavefront Correctors for Vision Science NATHAN DOBLE Iris AO Inc., Berkeley, California DONALD T. MILLER Indiana University, Bloomington, Indiana 4.1  INTRODUCTION Aberrations of the ocular media...

10.2.2   Basic System Design Figure 10.1 shows the basic layout for a conventional flood illumination ophthal- moscope endowed with AO. In this AO system, wavefront sensing is realized with a...

10.2.4   Wavefront Sensing Wavefront sensing in current conventional AO ophthalmoscopes is realized with a Shack–Hartmann wavefront sensor [5–7]. The light source of the sensor is...

Control Algorithms LI CHEN University of Rochester, Rochester, New York 5.1   INTRODUCTION The control algorithm is the vital link between the wavefront sensor and the wavefront corrector in an...

10.2.3   Optical Components As shown in the schematic, the deformable mirror and lenslet array of the wavefront sensor are strategically positioned conjugate to the eye’s pupil. There are...