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  5. FP0914 : Effect of Energy Levels in Nd:YAG Laser Capsulotomy on Intraocular Pressure and Macular Thickness.

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Chief & Presenting Author: Dr.Srijandeep Kumar

Co Author(s): Dr.Parthasarathi Gayan

Abstract

This observational study investigated the effects of various energy levels used in Nd:YAG laser capsulotomy on intraocular pressure (IOP) and macular thickness in 150 patients with posterior capsular opacity following cataract surgery. The procedure's energy settings were specifically tailored, ranging from 12 to 48 millijoules based on the severity of the capsular opacity. IOP and macular thickness were precisely measured before the procedure, and at 1 day, 1 week, and 1 month afterward. Patients treated with energy levels above 32 mJ experienced a significant initial increase in IOP (average increase of 4.7 mmHg, p<0.01) and macular thickness (average increase of 14.2 microns, p<0.01), which both normalized to baseline within a month. In contrast, those subjected to energy levels of 32 mJ or less showed minimal physiological changes, with an IOP increase of 1.2 mmHg and a macular thickness increase of 3.6 microns. These findings emphasize adjusting laser energy reduces risks.