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[Modification of refraction and visual noise perception by suction cup oculocompression]
U Schiefer1, H Wilhelm, E Zrenner
1Abteilung für Pathophysiologie des Sehens und Neuroophthalmologie, Universitäts-Augenklinik, Tübingen, Bundesrepublik Deutschland.
Fortschritte Der Ophthalmologie : Zeitschrift Der Deutschen Ophthalmologischen Gesellschaft
|January 1, 1991
Summary
Artificial elevation of intraocular pressure (IOP) using suction cup oculopression significantly reduced visual acuity and induced astigmatism. Refraction adjustment improved acuity, demonstrating IOP
Area of Science:
- Ophthalmology and Optometry
- Ocular Physiology
- Visual Optics
Context:
- Intraocular pressure (IOP) is a critical factor in ocular health, particularly in glaucoma.
- Understanding the effects of artificially elevated IOP on visual function is essential for interpreting tolerance tests.
- Suction cup oculopression provides a method to experimentally manipulate IOP.
Purpose:
- To investigate the impact of artificially elevated intraocular pressure (IOP) on visual acuity and refractive error.
- To assess the effect of suction cup oculopression-induced astigmatism on visual performance.
- To evaluate the efficacy of refractive correction under elevated IOP conditions.
Summary:
- Artificial IOP elevation (65 mmHg negative pressure) in healthy subjects decreased visual acuity from 1.06 to 0.39.
- Suction cup oculopression induced significant astigmatism (2.15 dpt), shifting the minus cylinder axis.
- Re-fractioning with the suction cup in place improved visual acuity to 0.64, demonstrating the impact of induced refractive changes.
Impact:
- Provides critical data for re-interpreting previous intraocular pressure tolerance studies.
- Highlights the significant influence of IOP-induced refractive changes on visual function.
- Demonstrates the potential of refractive correction to mitigate visual deficits under elevated IOP.