Title :
Automated keratometry at low cost
Author :
Ventura, Liliane ; Messias, André M Vieira ; Sousa, Sidney J F ; Coelho, Renato
Author_Institution :
Lab. de Fisica Oftalmica, Sao Paulo Univ., Brazil
Abstract :
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
Keywords :
automatic test equipment; biomedical equipment; eye; medical image processing; optical instruments; PC monitor; astigmatism axis; automatic optical system; corneal keratometry; curvature radius; dedicated software; image analysis; light ring projection; medical instrumentation; slit lamp; target deformation; Biomedical optical imaging; Cornea; Costs; Lamps; Lenses; Optical fibers; Optical refraction; Optical variables control; Refractive index; Telescopes;
Journal_Title :
Engineering in Medicine and Biology Magazine, IEEE
