Astigmatism, derived from Greek meaning "without spot," refers to a common refractive condition that decreases acuity. Astigmatism has both a magnitude and a direction, or axis, unlike spherical ...

Astigmatism occurs when the eye is shaped more like an oval than a sphere, causing blurry vision. Astigmatism affects about one in three Americans and it occurs more frequently as you age.

can be corrected for astigmatism (as well as these other defects) by using a lens which has one face spherical and the other cylindrical. 1 ...

Topography-guided laser vision correction offers several benefits for patients with irregular astigmatism. The procedure is not dependent on pupil size and can be measured reproducibly.

132, No. 1010 (2020 April), pp. 1-11 (11 pages) We present the development of Linear Astigmatism Free—Three Mirror System (LAF-TMS). This is a prototype of an off-axis telescope that enables very wide ...