Corneal Topographic Study Using Orbscan II between Keratoconus and Keratoconus Suspect.

Lee, Seung Uk; Lee, Chang Hwan; Lee, Ji Eun; Lee, Jong Soo

doi:2007.48.12.1599

J Korean Ophthalmol Soc > Volume 48(12); 2007 > Article

Original Article

Journal of the Korean Ophthalmological Society 2007;48(12):1599-1606.
DOI: https://doi.org/10.3341/jkos.2007.48.12.1599 Published online December 31, 2007.

Corneal Topographic Study Using Orbscan II between Keratoconus and Keratoconus Suspect.

Seung Uk Lee, Chang Hwan Lee, Ji Eun Lee, Jong Soo Lee

¹Department of Ophthalmology, College of Medicine, Pusan National University, Pusan, Korea. jongsool@pusan.ac.kr
²Department of Ophthalmology, Wallace Memorial Baptist Hospita, Pusan, Korea.

2형 오브스캔 각막지형도를 이용한 원추각막과 원추각막의증의 각막형태비교

이승욱¹,이창환²,이지은¹,이종수¹

Department of Ophthalmology, College of Medicine, Pusan National University¹, Pusan, Korea Department of Ophthalmology, Wallace Memorial Baptist Hospita², Pusan, Korea

Correspondence: Jong Soo Lee, M.D., Ph.D.

Abstract

PURPOSE
To compare corneal topographic changes using Orbscn II between keratoconus and keratoconus- suspected eyes. METHODS: Thirty-seven keratoconus eyes, 17 keratoconus-suspected eyes and 37 normal eyes were evaluated by using Orbscan II corneal topography. We compared central phachymetry, anterior elevation from best-fit sphere (BFS), posterior elevation from BFS, most protruded corneal thickness, central corneal thickness, anterior chamber depth, corneal diameter, and pupil size. RESULTS: Central pachymetry, anterior and posterior elevation from BFS, central corneal thickness, and anterior chamber depth were statistically significantly different between keratoconus and control eyes. Anterior elevation from BFS showed a significant difference between keratoconus-suspected and control eyes. There were statistically significant differences in central pachymetry, posterior elevation from BFS, central corneal thickness and most protruded corneal thickness between keratoconus and keratoconus-suspected eyes. Corneal diameter and pupil size showed no differences among the 3 groups. CONCLUSIONS: Suspected keratoconus eyes have a higher value of anterior elevation from BFS on Orbscan II topography as compared with control eyes. Central pachymetry, posterior elevation from BFS, central corneal thickness and most protruded corneal thickness may be helpful in distinguishing between keratoconus and keratoconus-suspected eyes.

Key Words: Anterior chamber depth;Best fit sphere (BFS);Keratoconus;Keratoconus suspect;Orbscan II corneal topography