An Interesting property of inverted telescopes and their relation to myopic eyes

Daniel Malacara-Hernandez; Zacarias Malacara

doi:10.1117/12.55793

1 March 1991 Interesting property of inverted telescopes and their relation to myopic eyes

Daniel Malacara-Hernandez, Zacarias Malacara

Author Affiliations +

Optical Engineering, Vol. 30, Issue 3, (March 1991). https://doi.org/10.1117/12.55793

Abstract

It is well known that telescopes magnify the image. However, it is not often mentioned that they also reduce the depth of field. Inverted Galilean telescopes obviously minify the object apparent size, but the depth of field is also increased. It has been observed that myopic persons wearing correcting noncontact eye glasses develop noticeable presbyopic effects at a later age than emmetropic persons. This effect may be explained by considering that the negative correcting lens and the positive myopic dioptric power of the eye together form an inverted Galilean telescopic system.

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Daniel Malacara-Hernandez and Zacarias Malacara "Interesting property of inverted telescopes and their relation to myopic eyes," Optical Engineering 30(3), (1 March 1991). https://doi.org/10.1117/12.55793

Published: 1 March 1991

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