Clinical Optics and Refraction

Implications of Atmospheric Differential Refraction for Adaptive Optics Observations

Many adaptive optics systems operate by measuring the distortion of the wavefront in one wavelength range and performing the scientific observations in a second, different wavelength range. One common technique is to measure wavefront distortions at wavelengths <∼1 μm while operating the science instrument at wavelengths>∼ 1 μm. The index of refraction of air decreases sharply from shorter visi...

Overlapping illusions by transformation optics without any negative refraction material

A novel method to achieve an overlapping illusion without any negative refraction index material is introduced with the help of the optic-null medium (ONM) designed by an extremely stretching spatial transformation. Unlike the previous methods to achieve such an optical illusion by transformation optics (TO), our method can achieve a power combination and reshape the radiation pattern at the sa...

REFRACTION PROBLEMS IN GEOMETRIC OPTICS April 22, 2013

Refraction of the Eye Including Elementary Physiological Optics

Clinical Applications of Wavefront Refraction

PURPOSE To determine normative reference ranges for higher-order wavefront error (HO-WFE), compare these values with those in common ocular pathologies, and evaluate treatments. METHODS A review of 17 major studies on HO-WFE was made, involving data for a total of 31,605 subjects. The upper limit of the 95% confidence interval (CI) for HO-WFE was calculated from the most comprehensive of thes...