| 摘要 |
PROBLEM TO BE SOLVED: To obtain distribution of refracting power by projecting a measuring index on a fixation position of the eyeground of an eye to be examined. SOLUTION: A measuring index light flux projected on the eyeground Ef is reflected and scattered on the eyeground Ef, condensed by an objective lens 1, reflected by a beam splitter 2 to reach a micro-lens array 9 through a lens 7 and a lens 8, and divided into a plurality of light fluxes by the micro-lens array 9 to be focused near the position of the optical path of the respective micro-lens array 9 on the light receiving surface of a two-dimensional imaging element 10. The lens 8, the micro-lens array 9 and the two-dimensional imaging element 10 are moved in a body along the optical path O2 so that the sizes of the respective images are minimized and the eyeground Ef and the object side focal surface of the lens 8 have optical conjugate relationship. According to the amount of movement, a measuring index projecting lens 4 is also moved on the optical path O1, interlocking with the above, the amount of movement is detected by a potentiometer, and the spherical surface refracting power of an eye E to be examined is calculated from the detected amount of movement.
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