Clinical Investigation and Development of Multifocal Posterior Chamber Lens.

Kim, Jae Ho; Hahn, Tae Won

Original Article

Journal of the Korean Ophthalmological Society 1993;34(5):384-392.
Published online May 1, 1993.

Clinical Investigation and Development of Multifocal Posterior Chamber Lens.

Jae Ho Kim, Tae Won Hahn

Department of Ophthalmology, Kangnam St. Mary's Hospital, Catholic University Medical College, Seoul, Korea.

다촛점 후방 인공수정체의 개발 및 임상적 연구

김재호(Jae Ho Kim),한태원(Tae Won Hahn)

Abstract

Since March 1990, we had tried to develop domestic-made multjfocal posterior chamber lens (PCL) in cooperation with Universal Optic Co. And then on April. 1992, we developed 3-zone multifocal intraocular lens after evaluation of lens design and its refractive power. Form June to July in 1992, we implanted this multifocal intraocular lens in 8 cataract patients(8 eyes) after obtaining informed consent and evaluated its clinical efficacy. Scanning electron microscopy revealed well manufactured, fine optic and haptic portion and smooth treatment of 3-zone optic surface for near vision. At 6 months after operation, 4 patients achieved naked distance visual acuity of 0.8 to 1.2 and 4 patients showed visual acuity of 0.5 to 0.7. Naked near vision was improved to J1(1 patient), J2(1 patient) and J3(2 patients), 4 patients obtained raked near vision below J3, 6 patients showed final refractive state within +/-1.0D and 2 patients noted hyperopic shift(+1.25 ~ +2.0D). On slit lamp examination, all PCLs were well centered in-the-bag after mydriasis and other complications related to PCL insertion were not occurred. The most common subjective symptom was halo at night(6 patients). Three patients also complained a ring shadow around the objects. Contrast sensitivity was decreased especially at night in all patients. From these results, this domestic-made multifocal PCL was effective to restore near and distance vision in cataract patients but side effects such as halo, ring shadow were resulted from the its unique 3-zone optic portion. Therefore, further investigation and study will be necessory to develop ideal type of multifocal PCL.

Key Words: Multifocal posterior chamber lens;3-zone;contrast sensitivity;halo;ring shadow