A Foveal Photoreceptor Explanation of Short Term Visual Acuity Recovery Associated with Laser Induced Foveal Damage

Amir Langus, Harry Zwick, Bruce E. Stuck, Michael Belkin

Research output: Contribution to journalConference articlepeer-review

Abstract

Both human laser accident cases and non-human primate behavioral studies demonstrate the possibility of full visual acuity recovery following foveal laser injury. Current explanations of such recovery require suppositions of complex retinal reorganization dynamics or neural reorganization at higher order visual brain systems. However, recent investigation based on data of retinal photoreceptor and ganglion cell topography and connectivity, suggest that the amount of static inherent plasticity, already exists at the retinal level, may also explain visual acuity recovery in the presence of laser-induced foveal damage. Modeling the off-axis visual acuity while utilizing this data, produces a more gradual fall-off in visual acuity, and supports the notion that visual acuity recovery may reside in the topographical organization of the cones. Moreover, considering the filling-in phenomena, which can conceal the presence of retinal damage from being recognized, together with eye movements, could nullify scotoma, as long as the retinal damage is not too extensive.

Original languageEnglish
Pages (from-to)39-50
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4953
DOIs
StatePublished - 2003
EventLaser and Noncoherent Light Ocular Effects: Epidemiology, Prevention, and Treatment III - San Jose,CA, United States
Duration: 26 Jan 200327 Jan 2003

Keywords

  • Cone spacing
  • Laser hazard
  • Macular laser lesion
  • Perceptual fill-in
  • Q-switched laser
  • Scotoma visibility
  • Visual acuity

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