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Automated keratometry at low cost

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4 Author(s)
Ventura, L. ; Lab. de Fisica Oftalmica, Sao Paulo Univ., Brazil ; Messias, A.M.V. ; Sousa, S.J.F. ; Coelho, R.

Describes an automatic optical system that is attached to a slit lamp in order to provide automatic keratometry at low cost. The system consists of projecting a light ring as a target onto the patient's cornea as well as analysis of the deformation of the target in order to obtain the radius of curvature and the axis of the associated astigmatism. The reflected image of the target is displayed on a PC monitor, while dedicated software performs the analysis of the image, which provides the corneal keratometry

Published in:

Engineering in Medicine and Biology Magazine, IEEE  (Volume:19 ,  Issue: 5 )

Date of Publication:

Sep/Oct 2000

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