Optical aberration theory is crucial for understanding and correcting the imperfections in images produced by telescopes, particularly in space telescopes where precision is paramount. Aberrations ...

Predicted wavefront aberrations are then obtained by tracing ... Lower-order aberrations — defocus and astigmatism — are responsible for most of the degradation in a retinal image.

particularly for evaluating corneal wavefront aberrations. Placido-disk systems have excellent accuracy and reproducibility in curvature measurement. The Orbscan ® (Bausch & Lomb, Rochester ...

The VISX STAR S4 laser is FDA approved for treatment of nearsightedness, farsightedness and astigmatism ... powered astronomical telescopes. Wavefront technology has been adapted to measure optical ...

Detecting Irregular Astigmatism or Other Abnormalities ... Corneal elevation data have been used to calculate the wavefront aberrations from the anterior corneal surface. Aspherical or prolate ...