A system for intracavity tilt aberration correction based on H-S wavefront sensor is established to correct low order aberration by control the concave mirror,and the aberration-corrected results are compared.
We studied the principle of excimer laser aberration correction system and the block diagram of system controlling software. The mechanism of action of excimer laser corneal ablation, "flying-spot" scanning, active eye ball tracking, as well as laser energy closing loop controlling key technologies had been discussed.
The concept of the human aberration was presented and analyzed why causing aberration. We applied Zernike polynomials to describe the shape of an aberrated wavefront in the pupil of an optical system fitted the data to a Zernike series to reconstruct the wavefront aberrations of living human eye. Given the expressions aberration guided cornea ablation depth, mechanism of action of excimer laser corneal surgery, the schema of the excimer laser aberration correction system.
The results show that the Hz component strongly affects both deflection aberration and Trilemma constant and that it plays a significant role in deflection aberration correction and field distribution optimization.