The Change of Pupil Cycle Time after Occlusion Therapy in Amblyopia.

Han, S H; Kim, J H; Lee, J B; Kwon, Oh Woong

Original Article

Journal of the Korean Ophthalmological Society 1997;38(2):290-295.
Published online February 1, 1997.

The Change of Pupil Cycle Time after Occlusion Therapy in Amblyopia.

S H Han, J H Kim, J B Lee, Oh Woong Kwon

¹The Institude of vision Research, Yonsei University College of Medicine, Seoul, Korea.
²Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea.

약시안에서 차폐치료 전후의 동공주기시간 변화

한승한(Han S.H),김종화(Kim J.H),이종복(Lee J.B),권오웅(Kwon Oh Woong)

Abstract

Persistant regular oscillation of the pupil can be induced using a slit lamp. The average period of these oscillations has been referred to the pupil cycle time. The pupil cycle time is a quantitative measurement of pupil reaction to light and it reflects the optic nerve function. In order to assess the pupil cycle time in amblyopia and change of the pupil cycle time before and after occlusion therapy, 24 monocualr amblyopia children aged from 4 to 11 years old were investigated. The mean pupil cycle time was 1448 +or- 344 msec in amblyopic eyes, 1354 +or- 278 msec in non-amblyopic eyes. As compare to non-amblyopic eye, the pupil cycle time of amblyopic eye was significantly prolonged. After the occlusion therapy, the mean pupil cycle time in amblyopic eyes(1537 +or- 381 msec was significantly reduced as compare to preocclusion one(1346 +or- 213 msec). We suppose the defect of the arc of pupillary light reflex and the possibility of the unkown pathway of pupillary light reflex in amblyopic eyes.

Key Words: Amblyopia;Occlusion therapy;Pupil cycle time