Position-induced Cyclotorsion under Monocular Fixation.

Jun, Jae Yeon; Huh, Dalwoong; Chang, Hae Ran

Original Article

Journal of the Korean Ophthalmological Society 2005;46(1):111-116.
Published online January 31, 2005.

Position-induced Cyclotorsion under Monocular Fixation.

Jae Yeon Jun, Dalwoong Huh, Hae Ran Chang

Department of Ophthalmology, Sungkyunkwan University School of Medicine, Kangbuk Samsung Hospital, Seoul, Korea. huhdalwoong@hanmail.net

단안 주시하 체위 변화에 따른 안구회선

전재연,허달웅,장혜란

Department of Ophthalmology, Sungkyunkwan University School of Medicine, Kangbuk Samsung Hospital, Seoul, Korea

Correspondence: Jae Yeon Jun M.D.

Abstract

PURPOSE
To determine whether cyclotorsion occurs when a patient moves from the seating to supine position fixating with one eye. METHODS: The axis of astigmatism was measured with the handheld automated refractometer (Retinomax K-plus, Nikon, Japan) in 33 eyes having more than -1.0D cylinder in seated and supine positions under monocular fixation. RESULTS: There was a cyclotorsional deviation in 30 eyes (90.90%). Excyclotorsion was shown in 22 eyes (66.67%) and incyclotorsion in 8 (24.24%). Seventeen eyes (51.50%) had a torsional deviation less than 4 degrees, 5 eyes (15.15%) from 5 to 6 degrees, 7 eyes (21.21%) from 7 to 14 degrees and one eye greater than 15 degrees. CONCLUSIONS: Positionally induced cyclotorsion occurs under fixation with one eye simulating refractive surgery. Surgeons should therefore make an effort to align the wavefront measurement to the ablation onto the cornea.

Key Words: Positionally induced cyclotorsion;Retinomax K-plus;Wave-front