Laser Interferometric Visual Acuity in Retinal Diseases.

Lee, Sung Jin; Ohn, Young Hoon; Shin, Hanho

Original Article

Journal of the Korean Ophthalmological Society 1995;36(10):1700-1705.
Published online October 1, 1995.

Laser Interferometric Visual Acuity in Retinal Diseases.

Sung Jin Lee, Young Hoon Ohn, Hanho Shin

Department of Ophthalmology, School of Medicine, Soonchunhyang University, Seoul, Korea.

망막질환에서 Laser Interferometry 로 측정한 시력

이성진(Sung Jin Lee),신환호(Han Ho Shin),온영훈(Young Hoon Ohn)

Abstract

Laser interferometry is used to evaluate the retinal visual function in the eyes with media opacity. Although interferometric acuity was known to be useful to predict postoperative Snellen acuity following cataract extraction, the results are somewhat confusing in the eyes with retinal diseases. The author measured interferometric acuity in 43 eyes from 32 patients who were affected by retinal diseases involving macula and had clear ocular media. Average interferometric acuity was 0.47. Hahn's acuity was 0.46 and correlation index between two acuities was 0.64 meaning moderate degree of correlation. Interferometric acuities were better than Hahn's acuity in 23 eyes(53.5%) and worse in 12 eyes(27.9%). Our results suggest that in eyes with macular lesion, interferometric acuity is not sufficient to predict Hahn's acuity although it has some degree of correlation. Therefore, in order to predict the postoperative visual acuity in eyes with media opacity and probable macular lesion, it will be necessary to combine other useful modalities.

Key Words: Laser interferometry;Hahn's acuity;interferometric acuity;macular lesion;retinal disease