The Apparent Accommodation after Implantation of Posterior Chamber Intraocular Lenses: Acrylic and Silicone

PURPOSE: We compared the apparent accommodative power of acrylic intraocular lens(IOL) with silicone IOL after implantation of IOL into the bag. METHODS: In 36 senile catatact patients(40 eyes)visited St. Mary's hospital from July 1999 to June 2000, the IOL was inserted into the capsular bag after continuous curvilinear capsulorhexis. All of them were over 60 years old. We checked corrected visual acuity, pupil diameter and apparent accommodative power by accommodometer(AA2000, Nidek, Japan) preoperatively and 1 day, 1 month, 2 months after surgery. The used IOLs were two groups, ones are Acrysof (Alcon, U.S.A.) in 20 eyes and the others are Soflex (Chiron vision, U.S.A.) in 20 eyes. RESULTS: The investgation revealed that the apparent accommodative power reached its peak at 1 month after surgery. There was no stastically significant difference(p>0.05) between acrylic IOL and silicone IOL in apparent accommodative power at 2 months after surgery. CONCLUSIONS: The analysis revealed that the pupil size had significant negative correlations with apparent accommodative power at each other group, whereas corrected visual acuity and refraction error showed no relationship with apparent accommodative power.

A Case of Linear Nevus Sebaceous Syndrome

The linear nevus sebaceous syndrome is a rare eurocutaneous syndrome that may be accompanied by ocular abnormalities. It consists of the triad of characteristic midline facial linear nevus sebaceous, neurologic abnormalities which may include cerebral and cerebellar hypoplasia, widening of the subarachnoid space, seizures, and mental retardation and ocular abnormalities that may include conjunctival lipodermoids, colobomas of the lids, iris, choroid, and disc, angiomas of the orbit, osseous choristomas of the choroid, and subretinal neovascularization. We experienced a 5 month-old patient who has normal gestational periods and karyotype 46, XY at chromosomal study. On physical examination, he was found to have a linear nevus sebaceous in the right midline of face and scalp. On ocular examination, he was found to have lipodermoid, optic atrophy, peripapillary staphyloma, macular hypogenesis and osseous choristoma of the choroid. CT scan showed widening of the subarachnoid spaces and cerebral and cerebellar hypoplasia. Histopathologically it was proved as nevus sebaceous. We report this unusual case with literature review.