To fit a contact lens to a patient's eye, a keratometercan be used to measure the curvature of the front surface of theeye, the cornea. This instrument places an illuminated object ofknown size at a known distance p from the cornea. Thecornea reflects some light from the object, forming an image of theobject. The magnification M of the image is measured byusing a small viewing telescope that allows comparison of the imageformed by the cornea with a second calibrated image projected intothe field of view by a prism arrangment. Determine the radius ofthe curvature of the cornea for the case p = 30.0 cmand M = 0.0130.