Henson D B, Earlam R A
Department of Optometry and Vision Sciences, University of Wales College of Cardiff, UK.
Ophthalmic Physiol Opt. 1995 Jan;15(1):59-62.
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 degrees 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.
准确的视野检查常常需要一种能同时校正屈光不正和周边检查距离的透镜系统。患者往往缺乏合适的近视力矫正镜片，而全孔径试验箱镜片即便有，也只能勉强覆盖中央30度范围，因此经常会产生镜片边缘伪迹。现已开发出一种用于视野检查的特殊矫正镜片系统，该系统克服了这些问题。此系统基于依视路老花眼演示装置，可头戴使用，适用于大多数视野计。
