Laser parameters [II,D]Contraction burns (long duration-low power-large spot size)
Spot size200-500 μm
Exposure0.3-0.6 sec
Power200-400 mW
LocationAiming beam should be directed at the most peripheral part of the iris
Optimal reactionVisible contraction of the peripheral iris with flattening of the iris curvature (without bubble formation or pigment release)
Number of spots20-24 spots over 360° leaving 2 beam diameters between each spot and avoiding visible radial vessels