Avi Aizenman and Norick Bowers
Monday, November 25, 2019
11:10 am - 12:30 pm
489 Minor Hall
Fixational stability as a metric for the recovery of visual function in amblyopia
Amblyopia is a developmental disorder which leads to reduced visual acuity and stereopsis as well as oculomotor anomalies such as eccentric and unsteady fixation. Reduced visual acuity is a defining symptom of amblyopia, and previous work has shown that fixational stability and visual acuity are correlated. Furthermore, fixational eye movements of the amblyopic eye have been shown to account for more than half of the variance in the amblyopic observers’ visual acuity. As reduced visual acuity is a central symptom of amblyopia, and recovery is measured by improved visual acuity, can fixational stability be used as a marker for the recovery of visual function in amblyopia? In this talk I will be presenting data from a pilot study which tracked fixational stability in amblyopic children during patching treatment to evaluate how fixational stability changes alongside improvements in acuity and stereopsis.
The Binocular Tracking Line Scanning Ophthalmoscope
The Scanning Laser Ophthalmoscope provides great opportunity for novel psychophysics experiments including high resolution retinal imaging, unparalleled eye tracking, and single-cell stimulation. However, the current SLO technology has several limitations that can stymie research of fine-scale vision. A new system is currently being developed that will greatly expand the capabilities of the SLO. This new system, called the Binocular Tracking Line Scanning Ophthalmoscope (BTLSO), will have greatly improved eye tracking capabilities due to its higher framerate and expanded dynamic range. It will also enable study of torsion, as well as comparison with conventional video eye trackers. This system is currently under development and this talk will primarily focus on system design and preliminary software development.