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Related Experiment Videos

Visual performance in idiopathic macular holes.

R G Smith1, S J Hardman Lea, N R Galloway

  • 1Department of Ophthalmology, Queen's Medical Centre, Nottingham.

Eye (London, England)
|January 1, 1990
PubMed
Summary

Idiopathic macular holes often cause less visual field loss than expected. Enlargement may occur without significant expansion of the absolute scotoma, possibly due to vitreous traction.

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Area of Science:

  • Ophthalmology
  • Retinal Diseases

Background:

  • Idiopathic macular holes (IMH) are typically associated with post-menopausal women and vitreomacular traction.
  • Previous research focused on IMH etiology, with less attention to the quality of visual loss.
  • Histological studies suggest full-thickness macular holes should cause central absolute scotomas.

Purpose of the Study:

  • To investigate the characteristics of visual loss in patients with full-thickness macular holes.
  • To compare the actual visual field defects with expected scotoma size based on hole diameter.

Main Methods:

  • Clinical assessment of visual loss in patients with full-thickness macular holes.
  • Evaluation using Amsler Chart and reading tests to detect scotomas.

Main Results:

  • The majority of patients with full-thickness macular holes did not exhibit an absolute scotoma detectable by standard charts or reading.
  • Observed visual field defects were smaller than predicted by the size of the macular hole.

Conclusions:

  • Macular hole enlargement may occur without a proportional increase in absolute scotoma size.
  • Tangential vitreous traction or epiretinal membrane contraction may explain the discrepancy between hole size and scotoma size.

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