A New Computer-Aided Laser Photocoagulation Technique for the Treatment of Retinal Disorders

Nahed Solouma, Sadeq Al-Sharafi, Mahmoud Fathy, and Abu Bakr Youssef


Retinal tracking, Laser photocoagulation, LCD, Optical switches.


Age-related macular degeneration and diabetic retinopathy are among major causes of blindness worldwide. Laser photocoagulation of certain positions in the affected retina is used to stop the progress of such disorders and prevent blindness. Unfortunately, the treatment procedure is done manually over many treatment sessions with about 50% failure rate. It is believed that these diseases will be completely managed if the treatment is done in one treatment session. In this paper, we explore a new technique of retinal laser photocoagulation in one treatment session. The method is based on generating a binary pattern representing the positions to be photocoagulated. This pattern can be sent to a 2-D array of switches that will allow certain points of an expanded laser beam to pass and block the others. The passed rays will be flushed to the retina in one shot. The modeling and experimental work done indicated that the procedure is promising.

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