A Health Byte: Astigmatism
An optical system with astigmatism is one where rays that propagate in two perpendicular planes have different foci. If an optical system with astigmatism is used to form an image of a cross, the vertical and horizontal lines will be in sharp focus at two different distances.
Channels: Medical
Tags: A Health Byte Astigmatism
Uploaded by: buraktube ( Send Message ) on 09-11-2010.
Duration: 3m 16s
