Ophthalmic apparatus

An ophthalmic apparatus comprising:

• an eye refractive power measurement unit which comprises an eye refractive power measurement optical system for projecting light of a measurement target onto a fundus of an examinee's eye and photo-receiving the light reflected from the fundus by a photodetector, and is arranged to obtain eye refractive power of the eye based on output from the photodetector;
• a target presenting optical system for presenting a target to the eye through a lens;
• a correction optical system placed in an optical path of the target presenting optical system, for correcting a refractive error of the eye seeing the target;
• a diaphragm switching unit arranged to switch an aperture size of a diaphragm, which is placed in a position substantially conjugate with a pupil of the eye with respect to the lens, between a first size corresponding to a pupil size of the eye in photopic vision and a second size larger than the pupil size of the eye in scotopic vision;
• a switching signal inputting unit arranged to generate a switching signal for switching the aperture size of the diaphragm between the first size and the second size;
• a mode setting unit arranged to input a setting signal for establishing a checking mode for checking visibilities in the scotopic vision and the photopic vision after measuring the eye refractive power;
• a correction optical system control unit arranged to control driving of the correction optical system based on the eye refractive power obtained by the eye refractive power measurement unit when the checking mode is established;
• and
• a diaphragm control unit arranged to control driving of the diaphragm switching unit based on the switching signal from the switching signal inputting unit to switch the aperture size of the diaphragm between the first size and the second size when the checking mode is established.