Why can larger beam laser produce the same quality of vision as the Allegretto Wave Laser?
• Answer: Larger beam lasers remove larger amounts of tissue within a fixed time period. The ablations must be delivered at lower repetition rates. The effect of lower repetition rates and larger beams results in more corneal dehydration and swelling between pulse placement which is more delayed resulting a less smoother ablation with more crater and ridge formation. The beams tend to be less homogeneous with hot and cold areas adding to the focus scatter. The peripheral ablations result in more spherical aberration and coma causing night glare and haloes and reduced quality of vision as the pupil changes in size.
