Eye refractive power measurement apparatus

An eye refractive power measurement apparatus, the apparatus comprising:

• a measurement optical system for projecting a measurement target onto a fundus of the eye to pick un a fundus reflection image of the measurement target as a ring image by a two-dimensional image-pickup element;
• storing means which stores the picked-up ring image as a measurement image;
• display means;
• measurement condition judging means which makes a judgment as to whether or not the stored measurement image satisfies a predetermined measurement condition;
• an alignment state detection means which detects an alignment state of the measurement optical system with respect to the eye;
• an alignment state judging means which makes a judgment as to whether or not the alignment state of the measurement optical system with respect to the eye during measurement is appropriate, based on a detection result of the alignment state detection means;
• a first display control means which controls the display means to display the stored measurement image when the alignment state judging means judges that the alignment state during measurement is appropriate and the measurement condition judging means judges that the stored measurement image does not satisfy the measurement condition;
• and
• a cause specifying means which specifies, when the measurement condition judging means judges that the stored measurement image does not satisfy the measurement condition, a cause thereof,
• wherein the first display control means controls the display means to display the specified cause.

An eye refractive power measurement apparatus for measuring eye refractive power of an examinee's eye, the apparatus comprising:

• a measurement optical system for projecting a measurement target onto a fundus of the eye to pick up a fundus reflection image of the measurement target as a ring image by a two-dimensional image-pickup element;
• a storing means which stores the picked-up ring image as a measurement image;
• a calculation means which obtains a measurement value of the eye refractive power based on the stored measurement image, the calculation means obtaining a reliability coefficient indicating the degree of reliability of the measurement value in stages based on the stored measurement image;
• a display means which displays the obtained measurement value;
• a measurement condition judging means which makes a judgment as to whether or not the stored measurement image satisfies a predetermined measurement condition;
• and
• a display control means which controls the display means to display the stored measurement image irrespective of a judgment result made by the measurement condition judging means, and the display controls means controls the display means to display the measurement value while assigned the obtained reliability coefficient.