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First Author: S.Shah INDIA
Co Author(s): V. Vasavada V. Vasavada M. Praveen A. Vasavada S. Raj
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To evaluate the change in contrast sensitivity at each spatial frequency, between preoperative and early postoperative visit, ,after pediatric cataract extraction and IOL implantation.
Iladevi Cataract & IOL Research Centre, Ahmedabad, India
A prospective clinical trial evaluated 22 eyes of 22 children, older than 4 years, undergoing pediatric cataract surgery with single-piece hydrophobic acrylic IOL implantation. Contrast sensitivity testing was done using CSV-1000E chart test face (Vector Vision) at 3, 6, 12, and 18 cycles per degrees (cpd) under photopic (85 cd/m2) and mesopic conditions (2.7 cd/m2) preoperatively and postoperatively, at 1 and 3 months. Best corrected visual acuity (BCVA) in LogMAR was also recorded. Absolute values of log contrast sensitivity function at each spatial frequency were obtained. Freidmans test was used to analyze any difference in these pairs of follow up.
A statistically significant difference in contrast sensitivity was observed at every visit with every spatial frequency under both, photopic and mesopic conditions between preoperative to 1 month : P<0.001, 1 to 3 months P<0.001 and preoperative to 3 months P<0.001. A statistically significant improvement was observed in BCVA from preop to 1 month P<0.001 and 1 to 3 months P<0.001.
There was a significant improvement in mean contrast sensitivity at all spatial frequencies under photopic and mesopic conditions and also in visual acuity after pediatric cataract surgery.