Patent ID: 7270413

Claim:
An ophthalmic data measuring apparatus comprising: a first light source part to emit a light flux of a first wavelength; a first illuminating optical system for performing illumination to condense the light flux from the first light source part on a vicinity of a retina of an eye to be examined; a first light receiving optical system for receiving a part of the light flux reflected by and returning from the retina of the eye to be examined through a first conversion member to convert it into at least substantially 17 beams; a first light receiving part for receiving the received light flux of the first light receiving optical system; and a calculation section to perform Zernike analysis based on an inclination angle of the light flux obtained by the first light receiving part, to obtain an optical characteristic of the eye to be examined, and (1) to estimate one of or two or more of a visual acuity, the optical characteristic and a sensitivity of the eye to be examined under an observation condition corresponding to an environment of the eye to be examined, or (2) to calculate appropriate correction data suitable for the eye to be examined, wherein the calculation section comprises: first means for obtaining measurement data indicating a refractive power distribution of the eye to be examined and pupil data including a value of a pupil diameter of the eye to be examined or a pupil diameter image and for obtaining lower order aberrations and higher order aberrations based on an observation condition parameter including the measurement data and the pupil data; second means for calculating an evaluation parameter indicating quality of visibility by the eye to be examined based on the observation condition parameter and/or the obtained lower order aberrations and the higher order aberrations; and third means for, in accordance with the calculated evaluation parameter, (1) estimating one of or two or more of the visual acuity, the optical characteristic and the sensitivity, of the eye to be examined under the observation condition corresponding to the environment of a subjective eye or (2) calculating the appropriate correction data suitable for the eye to be examined by changing the lower order aberration.