Abstract
The human eye has the purpose of converting the light that enters it into nerve impulses that are sent to the brain. Up to the stage of the retina, it functions much like a camera: It has an iris, a lens, and a retina that is like the photographic film of old cameras or electronic sensors of the more recent digital cameras. In this chapter, we review these features, with some detail and apply what we learned about lenses in Chap. 9 to the focusing of light by the eye lens onto the retina.
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Notes
- 1.
In order to appreciate this fact: If you have an opportunity to be present when slides are being projected onto a screen by a slide projector, place some fingers over the lens and notice that your fingers do not cast a shadow on the screen; instead, the image on the screen is simply dimmed non-uniformly.
- 2.
For a much more detailed drawing, see Eye and Brain, by R. L. Gregory, Princeton University Press; 5th edition (December 15, 1997).
- 3.
- 4.
See Wikipedia (1-28-2011): http://en.wikipedia.org/wiki/Pupillary_light_reflex and M.H.Pirenne, Vision and the Eye [Associated Book Publishers, London, 1987].
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Gunther, L. (2019). The Eye. In: The Physics of Music and Color. Springer, Cham. https://doi.org/10.1007/978-3-030-19219-8_13
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DOI: https://doi.org/10.1007/978-3-030-19219-8_13
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