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Abstract #18471 Published in IGR 3-3
Influence of retractive correction on peripheral visual field in static perimetry
Koller G; Haas A; Zulauf M; Koerner F; Mojon DGraefe's Archive for Clinical and Experimental Ophthalmology 2001; 239: 759-762
PURPOSE: To determine the influence of refractive errors on peripheral visual field thresholds in automated static perimetry. METHODS: in 47 subjects (aged 16-49 years), the difference of perimetric thresholds was tested in the peripheral visual field with and without contact lens correction, using a custom-made program (Goldmann stimulus size III) with the automated perimeter Octopus 2000 R. Refractor errors ranged from -16.75 to +12.5 diopters (D). Sixty-four test locations on three concentric rings between 30 and 50° in 19 hyperopic and 28 myopic eyes were tested. RESULTS: All rings in myopic eyes revealed a significance influence on refraction on the differential light sensitivity in the peripheral visual field. In hyperoptic eyes, only the inner ring showed a significant influence on refraction. The decrease in sensitivity, measured in dB/D, for the myopic inner ring, was 0.75; for the myopic middle ring, it was 0.46; for the myopic outer ring, 0.22; and for the hyperopic inner ring, 0.40. CONCLUSIONS: A significant association between refractive errors and differential light sensitivity exists in the peripheral visual field of myopic eyes. Therefore, contact lens wear is recommended when performing automated perimetry of the peripheral visual field of myopic patients with higher refractive errors.
Dr D. Mojon, Department of Strabismus and Neuro-Ophthalmology, Kantonsspital, 9007 St Gallen, Switzerland. daniel.mojon@kssg.ch
Classification:
6.6.2 Automated (Part of: 6 Clinical examination methods > 6.6 Visual field examination and other visual function tests)
