Image:Kc simulation.jpg

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Kc_simulation.jpg‎ (5KB, MIME type: image/jpeg)

[edit] Summary

A simulation of the monocular polyopia (visual ghosting) and streaking artifacts that are characteristic of keratoconus.

The left hand image shows the letter A as viewed with normal vision, and the right as affected by the irregular cone-shaped cornea of keratoconus. It is not possible to precisely represent a scene as viewed by a keratoconic patient; no two individuals ever see precisely the same effects, and the multiple image field is prone to change over time. The above is asserted to be a reasonable illustration of the author's own condition when uncorrected.

"Mere double vision is not complained of, but a candle, when looked at, appears like a number of lights, confusedly running into one another, but without coloured fringes, or other phenomena of chromatic aberration." — John Nottingham, Practical observations on conical cornea, 1854.

[edit] Licensing

I, the creator of this work, hereby grant the permission to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
Subject to disclaimers.

[edit] References

Moorfields Eye Hospital glossary URL accessed 18 March 2006 (UTC)
VisionSimulations.com URL accessed 18 March 2006 (UTC)
Nottingham J. Practical observations on conical cornea: and on the short sight, and other defects of vision connected with it. London: J. Churchill, 1854.

File history

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(del) (cur) 22:34, 21 January 2006 . . BillC (Talk | contribs) . . 519×307 (4,767 bytes) (Add effect of motion blur)
(del) (rev) 21:37, 21 January 2006 . . BillC (Talk | contribs) . . 519×307 (5,045 bytes) (A simulation of the effects of Keratoconus.)