Adaptation to Retinal Injury and Visual Loss
Abstract
Adaptation to simulated visual loss was explored with a simulated, eye-controlled scotoma in normal subjects with varying scotoma size and target configurations. With a single target subjects select asymmetrical viewing positions and produce abnormal drifting eye movements. Persistent fixations placed the scotomatous fovea reflexively on the target which reduced target viewing time. Monitoring two targets required a series of saccades but subjects refrained from making saccades and preferred gaze positions between targets. Subjects appear to use transients from target disappearance within scotoma edges to adjust eccentric eye position. Viewing time was longer with sharp scotoma edges than graded edges. Transients from scotoma edges may play a role in sizing and ranging the scotoma leading to optimum adaptation to visual loss.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 20, 1994
- Accession Number
- ADA284564
Entities
People
- James H. Bertera
Organizations
- Schepens Eye Research Institute