Contrast sensitivity assessment in pediatric cataract surgery: comparison of preoperative and early postoperative outcomes.

Abstract

To evaluate the preoperative and early postoperative differences in contrast sensitivity at high and low spatial frequencies after cataract extraction with in-the-bag intraocular lens (IOL) implantation in children presenting with lamellar and posterior subcapsular cataract. Iladevi Cataract & IOL Research Centre, Ahmedabad, India. Prospective clinical trial. In eyes with lamellar or posterior subcapsular cataract having cataract surgery with Acrysof SN60WF IOL implantation, contrast sensitivity testing was performed using the CSV-1000E sine wave grating test face at 3, 6, 12, and 18 cycles per degree under photopic (85.0 candelas [cd]/m(2)) and mesopic (2.7 cd/m(2)) conditions. The main outcome measures were contrast sensitivity under photopic and mesopic conditions preoperatively and 1 and 3 months postoperatively. The corrected distance visual acuity (CDVA) was recorded in logMAR units. The effect of the type of cataract and of age at surgery on contrast sensitivity preoperatively and 1 and 3 months postoperatively was also evaluated. The mean age of 13 patients (22 eyes) was 7.85 years ± 2.6 (SD). There was a statistically significant difference in contrast sensitivity at every timepoint at every spatial frequency under mesopic and photopic conditions. There was also a statistically significant improvement in CDVA from preoperatively to 1 month postoperatively and from 1 month to 3 months postoperatively (both P<.001). There was a significant improvement in contrast sensitivity at high and low spatial frequencies, even in children older than 4 years, after cataract surgery for lamellar or posterior subcapsular cataract. No author has a financial or proprietary interest in any material or method mentioned.