Physics – General Physics
Scientific paper
2004-05-05
J. Refract. Surg., 20, pp. S576-S580, (2004)
Physics
General Physics
Changed in response to referees. To appear in J. Refract. Surg
Scientific paper
Purpose: Recently the authors presented a technique that allows corneal thickness measurements along any meridian from optical sections obtained using a rotary scanning system. This paper presents 3-D mapping of the corneal thickness and topography of both corneal surfaces, obtained with the rotary system. Method: Corneal thickness and topography are computed from optical sections obtained by illumination with a collimated beam expanded in a fan by a small cylindrical lens. This lens is provided with motor driven rotation in order to perform automated rotary scan of the whole cornea. Two cameras are used to capture the images of the optical sections. Results: With this system it is possible to obtain 3-D representation of the corneal thickness as well as corneal topography. Corneal thickness and elevation maps are shown. Conclusions: Although still under development, this new optical system allows the measurement of the thickness of the whole cornea as well as 3-D mapping of both corneal surfaces.
Almeida Jose B.
Franco Sebastian
Parafita M.
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