| 摘要 |
To provide a cornea shape measuring apparatus which is possible, without making the entire apparatus larger-scaled, to increase the number of transparent ring-shaped patterns and project the ring-shaped patterns over the wide range of the cornea of the subject's eye, and the distance between the outermost transparent ring-shaped pattern and the cornea of the subject's eye is made substantially the same as the distance between the inner transparent ring-shaped pattern and the cornea of the subject's eye to enable obtainment of sufficient illuminating quantity of light with a minimum light source. The cornea shape measuring apparatus in which concentric ring-shaped pattern light which is emitted from a plurality of ring-shaped light sources and passed through a plurality of transparent ring-shaped patterns is projected as ring-shaped images on the cornea of the subject's eye, wherein an outer transparent ring-shaped pattern for making a part of light emitted from the outermost ring-shaped light source a ring-shaped pattern, and a ring-shaped refractive prism reflected toward the subject's eye or a ring-shaped reflecting plate is provided along the outer peripheral edge of a pattern plate.
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