Apparatus and methods for producing narrow-band radiation in the green region of the visible spectrum are described. The narrow-band radiation may be used to aid subjects experiencing photophobia. In some cases, subjects may experience a reduction in pain (e.g., migraine photophobia) when using the narrow-band radiation.

The invention provides a vision-testing method and vision-testing device. The vision-testing method is applied to the vision-testing device. The vision-testing device includes a light-transmitting apparatus, a plurality of vision test marks arranged on one side of the light-transmitting apparatus, and a plurality of light-emitting units arranged on another side of the light-transmitting apparatus for providing the vision test marks with a light source. The vision-testing method comprises the steps of obtaining a vision test command, controlling one of the light-emitting units to emit light according to the vision test command so as to highlight the corresponding vision test mark, obtaining user-response information and outputting a vision test result according to the user-response information and the highlighted vision test mark. The vision-testing method provided by the invention can achieve the vision test without a professional guidance, and the user can obtain real-time vision test information.

A ring halometer system configured to quantify dysphotopsias in a patient. The system includes a white screen and a first light source configured to emit a glare source from the white screen. The glare source is configured to form a veil of light visible to the patient when the glare source interacts with an optical surface of the eye of the patient. The system also includes a second light source configured to project a light ring with varying luminance concentric with the glare light source on the white screen, and a controller coupled to the second light source configured to adjust a size of the light ring. The system may also include an electronic device configured to determine a level of bothersomeness of the dysphotopsias experienced by the patient based on the size of the light ring.

A reflectometry instrument includes a light source for emitting an illumination beam that illuminates the macula. A portion of the illumination beam is reflected from the macula and forms a detection beam. The detection beam is indicative of macular pigment in the macula. The instrument also includes a first mirror for reflecting the illumination beam toward the macula and for reflecting the detection beam from the macula. The instrument is configured so that the illumination beam and the detection beam remain separated between the macula and the first mirror.

Provided is an information processing device including an arithmetic processing unit that executes arithmetic processing related to calibration of detection of a sight line toward a display unit. The arithmetic processing unit determines calibration executability for each of both eyes based on acquired sight line data and uses only the sight line data of an eye for which calibration is determined to be executable when executing calibration for the eye.

A narrow angle illumination light source for an ophthalmic surgical laser system includes multiple light emitting diodes (LEDs), multiple corresponding ball lenses, multiple corresponding upper apertures located between the LEDs and the lenses (optional), and multiple corresponding lower apertures located below the lenses. The light passing through each upper aperture and corresponding lens forms a light cone having a defined divergence angle and cone axis angle; the light cone only illuminates the corneal and sclera of a docked eye without illuminating the patients nose and orbit. The lower apertures may have distinctive shapes to aid video focusing. The multiple LEDs are distributed uniformly in the circle, and may be divided into multiple independently controllable segments which allows directional illumination. The LEDs also have controllable brightness to allow images of darker and brighter illuminations to be taken in short succession.

An ophthalmologic processing apparatus according to embodiments acquires data of a fundus of a subject's eye optically. The ophthalmologic apparatus includes a fixation system, an image acquisition unit, a specifying unit, and a determination unit. The fixation system is configured to project fixation light onto an eye of a subject. The image acquisition unit is configured to acquire an image of the fundus of the subject's eye in a state where the fixation light is projected by the fixation system. The specifying unit is configured to analyze the image acquired by the image acquisition unit to specify an image region corresponding to a predetermined site of the fundus. The determination unit is configured to determine whether or not the image region specified by the specifying unit is included within a predetermined range in the image acquired by the image acquisition unit.

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.

A device and a method for determining a change in the visual comfort of a user, the device including at least one light source for stimulating at least one eye of the user, a sensing circuit facing at least one eye area of the user when the device is worn by the user, the sensing circuit being configured to remotely acquire at least one signal representative of at least one characteristic of said at least one eye area, and a controller configured to determine a change in the visual comfort of the user depending on a variation of said at least one signal acquired by the sensing circuitry.

An ophthalmic apparatus includes a tester having a target projecting optical system and a target photographing optical system. with a configuration on an examinee's eye side being non-telecentric, an alignment adjuster that adjusts at least a positional relationship between an examinee's eye and the tester in the direction of a working distance between the examinee's eye and the tester, and a corrector that acquires an actual error from a proper working distance based on association information indicating the association of position information on the positions of first and second target images on an observation image with an error in the working distance with respect to the proper working distance due to the corneal curvature radius of the examinee's eye and the non-telecentricity of the target photographing optical system and the position information on the tester at the current position thereof in the working distance direction, correcting the actual error.