Abstract: A circular array of twelve light sources transmit light to an eye. A spherical shape of the cornea of the eye is indicated when light reflected therefrom appears to be transmitted from twelve virtual light sources disposed along a circular path within the eye. Correspondingly, an aspherical shape of the cornea is indicated when the virtual sources appear to be disposed along an acircular path within the eye. The array may be disposed within a light reflecting groove which collects ambient light which is transmitted to the eye. A reflection of the collected light appears to be a ring of light which connects the virtual sources.
Type:
Grant
Filed:
July 17, 1974
Date of Patent:
September 6, 1977
Assignee:
Surgical Microsystems, Inc.
Inventors:
Joseph A. La Russa, Richard C. Troutman