Effects on choroidal nerves after panretinal xenon arc and argon laser photocoagulation

The effect on range of accommodation, size of pupil and corneal sensitivity of panretinal photocoagulations was investigated in 30 diabetic patients. Treatments with the xenon arc or the argon laser produced significant changes in the 3 parameters one month after photocoagulation, but only when retrobulbar anaesthesia was used. After 6 months the range of accommodation and the size of the pupil were almost normalized. The corneal sensitivity remained significantly reduced.