title: Dual wavefront sensing channel monocular adaptive optics system for accommodation studies.
abstract: Manipulation of the eye's aberrations using adaptive optics (AO) has shown that optical imperfections can affect the dynamic accommodation response. A limitation of current system designs used for such studies is an inability to make direct measurements of the eye's aberrations during the experiment. We present an AO system which has a dual wavefront sensing channel. The corrective device is a 37-actuator piezoelectric deformable mirror. The measurements used to control the mirror, and direct measurements of the eye's aberrations, are captured on a single Shack-Hartmann sensor. Other features of the system include stroke amplification of the deformable mirror and a rotating diffuser to reduce speckle.We demonstrate the utility of the system by investigating the impact of aberration dynamics on the control of steady-state accommodation on four subjects.
authors.affiliation: Bradford School of Optometry and Vision Science, University of Bradford, Richmond Rd, Bradford, UK.
authors.forename: Karen M
authors.initials: KM
authors.lastname: Hampson
authors.forename: Sem Sem
authors.initials: SS
authors.lastname: Chin
authors.forename: Edward A
authors.initials: EA
authors.lastname: Mallen
mesh_terms: D057128:Aberrometry / Q000295:instrumentation*; D017076:Computer-Aided Design; D057108:Corneal Wavefront Aberration / Q000175:diagnosis*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006801:Humans; D007909:Lenses; D019721:Ophthalmoscopes; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity