Disclosed herein are methods and apparatus for making a determination about an eye comprising detecting light reflected out of an eye of a subject from a retina of the eye of the subject and making a determination about the eye of the subject based upon the reflected light, wherein the light is adjusted for color temperature when making the determination about the eye.

A line-of-sight measurement device includes: an imaging unit that images a face of a subject; a light illumination unit that illuminates light to an eye of the subject; a camera coordinate system eyeball center coordinate calculation unit that estimates coordinates of an eyeball center, from a face image imaged by the imaging unit; a pupil center calculation unit that estimates coordinates of an apparent pupil center, from a pupil center position on the face image; an eyeball position orientation estimation unit that calculates an optical axis vector toward the pupil center from the eyeball center on the basis of the coordinates of the eyeball center and the apparent pupil center; a corneal reflection image calculation unit that obtains coordinates of a corneal reflection image on the basis of the coordinates of the eyeball center, the optical axis vector, and a predetermined eyeball model; and an image coordinate calculation unit that estimates image coordinates of a corneal reflection image on the face image, from the coordinates of the corneal reflection image.

In certain embodiments, an ophthalmic surgical system for viewing an eye includes an ophthalmic microscope and a laser device. The ophthalmic microscope receives light reflected or scattered backwards from within the vitreous of the eye in order to provide an image of an object within the vitreous. The ophthalmic microscope includes a slit illumination source (which includes a light source and an optical element), a spectral filter, and oculars. The slit illumination source illuminates the eye with light, where the light source provides the light, and the optical element directs the light into the eye. The spectral filter filters out red spectral components of the light. The oculars receive the light from the eye in order to provide the image of the object. The laser device generates a laser beam to direct towards the object within the eye.

Disclosed herein are methods and apparatus for making a determination about an eye in ambient lighting conditions comprising detecting ambient light reflected out of an eye of a subject from a retina of the eye of the subject and making a determination about the eye of the subject based upon the reflected ambient light, wherein the ambient light is adjusted for color temperature when making the determination about the eye.

Disclosed herein are methods and apparatus for making a determination about an eye in ambient lighting conditions comprising detecting ambient light reflected out of an eye of a subject from a retina of the eye of the subject and making a determination about the eye of the subject based upon the reflected ambient light.

A method may include controlling alignment of the eye in an ophthalmological imaging device that includes an imaging system with a given optical axis. The method may include the formation, on a two-dimensional detection plane, of an image of an element located in a plane of the pupil of the eye. The method further includes the determination of a lateral position of the pupil of the eye with respect to a point of origin of a reference frame of the imaging system, on the basis of the position of the image. The method further includes the analysis of a state of focus of the image. The method further includes the determination of an axial position of the pupil of the eye with respect to the point of origin of the reference frame of the imaging system, on the basis of the analysis of the state of focus.

A method, a controller, and a non-transitory medium for controlling an optical-image pickup apparatus. Receiving quality data representative of quality of wavefront data. Comparing the quality data to a threshold. Performing normal adaptive optics feedback if the wavefront data is of sufficient quality. Performing an initial adjustment if the wavefront data is not of sufficient quality. The initial adjustment comprising sending control information to modify the optical path in which light is radiated onto a subject. After the initial adjustment, receiving new quality data that is based on new wavefront data after the optical path has been modified. Performing the normal adaptive optics feedback if the quality information indicates that the wavefront data is of sufficient quality. Re-performing the initial adjustment if the new quality information indicates that the wavefront data is not of sufficient quality.

A low cost fundus camera uses LED light sources placed adjacent the camera's imaging stop, and thereby eliminates the need for optics for introducing the light source to the camera's optical path. Lens reflex in the pupil relay is avoided by using only reflective optics in the pupil relay. Reflex from the LEDs is mitigated by actuating each LED separately, one at a time, and capturing a separate image with each actuated LED. Reflex-free regions of each captured image are extracted and combined to create a composite, reflex-free image.

Disclosed herein are methods and apparatus for making a determination about an eye comprising detecting light reflected out of an eye of a subject from a retina of the eye of the subject and making a determination about the eye of the subject based upon the reflected light.

An ophthalmologic apparatus includes an OCT measurement unit, a corneal shape measurement unit, an eyeball model generator, and a site specifying unit. The OCT measurement unit is configured to acquire data of a subject's eye by deflecting measurement light using an optical scanner to project onto the subject's eye and detecting interference light between returning light of the measurement light from the subject's eye and reference light. The corneal shape measurement unit is configured to obtain curvature radius distribution on a cornea by detecting returning light of a measurement pattern projected onto a cornea of the subject's eye. The eyeball model generator is configured to generate an eyeball model using the curvature radius distribution on the cornea. The site specifying unit is configured to specify a traveling direction of the measurement light by performing ray tracing on the measurement light incident on each of a plurality of incident positions on the cornea based on a scan angle and the eyeball model, and to specify a position corresponding to an intraocular site of the subject's eye in the traveling direction based on the data acquired using the measurement light.