Prism Diopter for Unconformity between the Optical Center and the Pupil Center.

Lee, Young Dal; Lee, Young Il; Bae, Sun Ryang

Original Article

Journal of the Korean Ophthalmological Society 2003;44(8):1859-1864.
Published online August 1, 2003.

Prism Diopter for Unconformity between the Optical Center and the Pupil Center.

Young Dal Lee, Young Il Lee, Sun Ryang Bae

¹Department of Ophthalmology, College of Medicine, Daejeon St. Mary's Hospital, The Catholic University of Korea. sunrbae@yahoo.com
²Department of Optical science, Dongnam Health College, Suwon, Korea.

안경의 광심과 동공중심 불일치에 의한 유발 프리즘

이영달 ( Lee Yeong Dal ) , 이영일 ( Lee Yeong Il ) , 배선량 ( Bae Seon Lyang )

Abstract

PURPOSE
To investigate the effect of the difference between interoptical and interpupillary center distance on the eye of the patient. METHODS: One hundred patients were enrolled in this study. We investigated the congruities between interpupillary and interoptical center distance, the horizontal balance of optical center, and the induced prismatic effects. RESULTS: Prismatic effects were evaluated for 30 patients who were wearing inaccurate lens centering. The average of P.D in male (64.2+/-2.7 mm) was greater than that in female (61.2+/-2.2 mm). The evolution of the induced horizontal phoria showed that forty-seven percent of the patients had induced exophoria and fifty-three percent of the patients had induced esophoria. The prism diopter of the induced exophoria and esophoria were 0.92+/-0.87delta and 0.62+/-0.46delta, respectively. CONCLUSIONS: When the pupillary distance of or the interpupillary distance was not accurately measured, the prism effect and the induced phoria developed by the difference between interoptical and interpupillary center distance.

Key Words: Ophthalmic dispensed glasses;Prismatic effects;Pupillary distance