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Optical Maths


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About pantoscopic angle and wrap angle

About pantoscopic angle and wrap angle

Calculating with optical correction power of parallel thin lens systems is very easy using the concept of vergence. However, if the lenses are not parallel, but…

Peter Torma, PhD May 14, 2018
About the vertex distance

About the vertex distance

Vertex distance is the distance between the eye (front of the cornea) and the corrective lens. In most cases, it is considered zero for contact lenses. In case of…

Peter Torma, PhD May 7, 2018
Geometry of eye convergence

Geometry of eye convergence

It is well known that the pupils of the human eye moves closer to each other whenever the person is focusing on closer objects. The pupils are the farthest from…

Peter Torma, PhD April 30, 2018