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Correcting lens system for perimetry
Author(s) -
Henson David B.,
Earlam Richard A.
Publication year - 1995
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1046/j.1475-1313.1995.9592794.x
Subject(s) - presbyopia , lens (geology) , optometry , optics , refractive error , computer science , aperture (computer memory) , head (geology) , artificial intelligence , medicine , physics , visual acuity , geology , geomorphology , acoustics
Summary A lens system to correct for both refractive error and perimeter test distance is frequently needed for accurate perimetry. Patients often lack appropriate near vision corrections and full aperture trial case lenses, when they are available, barely cover the central 30° and hence frequently produce lens rim artefacts. A special system of correction lenses has been developed for perimetry which overcomes these problems. This system is head mounted, being based upon the Essilor presbyopia demonstration set, and is suitable for use with most perimeters.