Results of transscleral diode laser cyclophotocoagulation for refractory glaucoma after penetrating keratoplasty

摘要

We treated 20 eyes of glaucoma after penetrating keratoplasty by transscleral diode laser cyclophotocoagulation. All the eyes had failed to achieve control of intraocular pressure (IOP) by medication. We used a diode laser with 800 nm in wavelength, 2 seconds each for exposure, power output from 500 to 2,000 mW, and 10 to 40 exposures per session. After follow-up for 15 to 265 weeks averaging 103 weeks, the average IOP decreased to 23 mmHg from pretreatment level of 39 mmHg. IOP decreased in 19 eyes with medication. IOP decreased below 21 mmHg in 13 eyes (65%) without medication, including 7 eyes which attained IOP control after a single session. Loss of light perception occurred in 2 eyes and vitreous hemorrhage in 1 eye. The donor cornea was initially transparent in 14 eyes. It became opaque in 6 eyes after treatment. The findings show that transscleral diode laser cyclophotocoagulation is relatively safe and effective for refractory glaucoma after penetrating keratoplasty.