0 a fault in the lens of the eye that reduces the quality of sight, especially a fault that stops the eye from focusing
The full micrograph is subdivided into, say, 2048i2048 pixel patches for which the defocus and astigmatism parameters are determined.
The axis of the astigmatism is turned by 908 like found in the experiment.
The beam profile is elliptical due to the strong value of astigmatism pre-corrected (4l).
The ray tracing analysis yields a set of characteristics of interest to optical designers, including distortion, astigmatism, and chromatic aberration.
For instance, two boys had mild or low hyperopia, one had myopia, and one had a relatively important astigmatism.
The precompensation approach showed that we were able to introduce 3l of astigmatism with no arm for the system.
Astigmatism is normally seen as a - not always avoidable - flaw in the data.
These doubts were based upon a fundamental optical phenomenon called astigmatism, which can be described as follows.
