The Alcon/Summit/Autonomous perspective on fixed vs. variable spot ablation.

The LADARVision system utilizes a small fixed diameter excimer laser beam coupled with a high fidelity eye tracking system to perform wavefront-guided refractive surgery. The fixed small beam provides a consistent ablation per pulse. By delivering many identical pulses in a predetermined pattern, which includes an optimized custom blend zone, the laser is able to ablate complex (higher order) corneal shapes accurately. The closed loop eye tracking system ensures that accurate ablation is delivered to the right place on the eye.