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Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
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Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition
07:45

Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition

Published on: July 21, 2020

Does partial occlusion promote normal binocular function?

Jingrong Li1, Benjamin Thompson, Zhaofeng Ding

  • 1State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, People's Republic of China.

Investigative Ophthalmology & Visual Science
|September 8, 2012
PubMed
Summary
This summary is machine-generated.

Bangerter filters disrupt binocular function more than expected in amblyopia treatment. Optical defocus may be a better alternative for improving binocular vision.

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Area of Science:

  • Ophthalmology
  • Vision Science
  • Neuroscience

Background:

  • Abnormal binocular interactions are central to amblyopia.
  • Partial occlusion is explored as an alternative to complete occlusion for amblyopia treatment.
  • Bangerter filters are optical devices used for partial occlusion.

Purpose of the Study:

  • Investigate why Bangerter filters do not improve binocular outcomes compared to complete occlusion.
  • Compare the effects of Bangerter filters, optical blur, and neutral density (ND) filters on normal binocular function.

Main Methods:

  • Assessed Bangerter filter effects (0.8, 0.6, 0.4, 0.2 strengths) on acuity, contrast sensitivity, stereoacuity, and interocular suppression in 21 normal observers.
  • Compared partial occlusion effects of Bangerter filters, ND filters, and plus lenses on stereopsis and interocular suppression in 14 observers.

Main Results:

  • Bangerter filters disrupted binocular function significantly, without a graded effect.
  • Disruption from Bangerter filters was greater than monocular defocus but less than ND filters.
  • Stereopsis deficits were more pronounced than acuity deficits and not predicted by them.

Conclusions:

  • Bangerter filters significantly disrupt binocular function.
  • Optical defocus and dichoptic stimuli may be more suitable for targeting binocular function in amblyopia treatment.
  • Partial occlusion with Bangerter filters may not be optimal for amblyopia therapy.