Corneal topography: Difference map for overnight corneal reshaping (OCR)

(A) Prefitting topography map.
(B) Post-fitting topography map (after 2 months of OCR).
(C) Difference map: Computer analysis of location and quantity of corneal curvature changes.

OCR: overnight corneal reshaping.

Courtesy of Michael J Lipson, OD, FAAO.

Graphic 89486 Version 2.0

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