The Correction of Corneal Astigmatism Using Piggyback Contact Lens.

Choi, Si Hwan; Jung, Sang Yeop; Kim, Seung Young

Original Article

Journal of the Korean Ophthalmological Society 1998;39(6):1140-1144.
Published online June 1, 1998.

The Correction of Corneal Astigmatism Using Piggyback Contact Lens.

Si Hwan Choi, Sang Yeop Jung, Seung Young Kim

Department of Ophthalmology, College of Medicine, Chungnam National University, Taejon, Korea.

Piggyback 큰택트렌즈를 이용한 각막난시의 교정

최시한(Si Hwan Choi),정상엽(Sang Yeop Jung),김승영(Seung Young Kim)

Abstract

We evaluated the effects of piggyback contact lens that override the hard contact lens over soft contact lens for irregular astigmatic correction. Two patients received corneal suture for corneal laceration and one patient received penetrating keratoplasty for Francois dystrophy. The uncorrected visual acuity was counting fingers at 20cm, 0.05, and 0.08, respectively and corrected visual acuity using glasses or conventional contact lens was 0.1, 0.2, and 0. 2, respectively. The difference of keratometry reading between two meridians is 6, 7.5, and 12.5 diopters, respectively. The visual acuity after piggyback contact lens fitting was 0.4, 0.9, and 0.3, respectively. The complication such as corneal ederna, corneal erosion, and neovascularization of cornea was not noted during 24 months after piggyback contact lens fitting. The piggyback contact lens fitting inay be an effective method of correcting visual acuity for irregular astigmatism.

Key Words: Irregular astigmatism;Keratometry;Pigyyback contact lens