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Neovascular glaucoma developing after uncomplicated cataract surgery for heavily irradiated eyes
1Department of Ophthalmology and Visual Sciences, Chinese University of Hong Kong, Hong Kong.
Purpose:
The purpose of the study was to evaluate the effect of cataract surgery and postoperative panretinal photocoagulation (PRP) on the development of neovascular glaucoma (NVG) in heavily irradiated eyes.
Patients And Methods:
The authors performed a retrospective study on the incidence of NVG in 90 eyes that had received megavoltage external beam irradiation at a retinal dose of 56 to 80 Gy and that had at least 48 months of follow-up. These eyes were categorized into different groups depending on whether cataract surgery or PRP was performed. Rates and proportions of NVG occurring in these groups were compared and analyzed with one-tailed Fisher's exact test.
Results:
The incidence of NVG was significantly higher in patients who underwent cataract surgery without postoperative PRP (P < 0.01). Neovascular glaucoma did not develop in any patient who underwent cataract surgery and PRP.
Conclusions:
Cataract surgery may accelerate the development of NVG in heavily irradiated eyes. Photoablation of ischemic retina is recommended before cataract surgery or soon thereafter if cataract density precludes laser treatment.