Ophthalmic apparatus for photographing the anterior part of the eye with a reproducible photographing position

Ophthalmic photographing apparatus for photographing an anterior part of an examinee's eye, comprising:

• an alignment optical system including,
• a reflection image forming means for forming an image reflected on a cornea of the examinee's eye,
• an observation optical system for observing an image of the anterior part of the examinee's eye, comprising an alignment reticle;
• a slit image projection system for projecting a slit image onto the examinee's eye;
• a photographing system for photographing a sectional image of the examinee's eye cross-sectioned with said slit image;
• means for storing a memorized picture image of said sectional image photographed with said photographing system;
• means for detecting alignment deviation by processing a signal of said memorized picture image to detect an apical position of said cornea and by finding a dislocation distance of said apical position from a reference position;
• means for analyzing said memorized picture image at an analyzing position;
• and
• means for correcting said analyzing position on the basis of said dislocation distance.

Ophthalmic photographing apparatus for photographing an anterior part of an examinee's eye, comprising:

• an alignment optical system including,
• a reflection image forming means for forming an image reflected on a cornea of the examinee's eye,
• a photographing optical system for photographing an image of the anterior part of the examinee's eye,
• an alignment reticle;
• means for displaying said image of the anterior part of the examinee's eye and an image of said alignment reticle;
• a slit image projection system for projecting a slit image onto the examinee's eye;
• a photographing system for photographing a sectional image of the examinee's eye through a CCD camera based on Sheimpflug's principle, said sectional image being obtained through said slit image projected by said slit image projection system;
• means for storing a memorized picture image of the sectional image photographed with said CCD camera;
• means for detecting alignment deviation by processing a signal of said memorized picture image to detect at least three points near the apex of said cornea and by finding a dislocation distance of an apical position of said cornea from a reference position;
• means for displaying the photographed sectional picture image of the examinee's eye;
• a display circuit for displaying a graphic pattern on the display means;
• and
• means for correcting the graphic pattern displayed on the display means on the basis of said dislocation distance.

Ophthalmic photographing apparatus for photographing an anterior part of an examinee's eye, comprising:

• an alignment optical system including,
• a reflection image forming means for forming an image reflected on a cornea of the examinee's eye,
• an observation optical system for observing an image of the anterior part of the examinee's eye, comprising an alignment reticle and a CCD camera;
• a photographing optical system for photographing the anterior part of the examinee's eye;
• means for storing a memorized picture image of the anterior part of the examinee's eye photographed with said photographing optical system;
• means for detecting alignment deviation by processing a signal of said memorized picture image to detect a designated part and by finding a dislocation distance of said designated part from a reference position;
• means for analyzing said memorized picture image at an analyzing position;
• and
• means for correcting said analyzing position on the basis of said dislocation distance.