An ophthalmologic apparatus includes an optical scanner, an interference optical system, an intraocular distance calculator, an image correcting unit, and a controller. The optical scanner is disposed at an optically substantially conjugate position with a first site of a subject's eye. The interference optical system is configured to split light from a light source into reference light and measurement light, to project the measurement light onto the subject's eye via the optical scanner, and to detect interference light between returning light of the light from the subject's eye and the reference light via the optical scanner. The image forming unit is configured to form a tomographic image of the subject's eye corresponding a first traveling direction of the measurement light deflected by the optical scanner, based on a detection result of the interference light. The intraocular distance calculator is configured to obtain an intraocular distance between predetermined sites of the subject's eye based on the detection result of the interference light. The image correcting unit is configured to correct the tomographic image based on the intraocular distance. The controller is configured to control at least the optical scanner.

A system for measuring at least one parameter of an eye. The system includes a probe detachably arranged within a housing, wherein the probe is operable to impact a surface of the eye with a predefined impact attribute, at least one coil operable to maintain the probe within the housing, to release the probe towards the surface of the eye and to retract the probe into the housing, a probe vibration means operable to induce vibration to the probe, a measuring means for measuring a change in vibration of the probe upon impact on the surface of the eye and a controller configured to use the measured change in vibration of the probe to determine the at least one parameter of the eye.

Ocular photosensitivity analyzer. In an embodiment, a programmable light source, comprising a plurality of multi-spectra light modules, is configured to emit light according to a lighting condition. For one or a plurality of iterations, the programmable light source is activated to emit the light according to the lighting condition, and collect a response, by a subject, to the emitted light via a sensing system comprising one or more sensors. Between iterations, the programmable light source may be reconfigured based on the response to determine a visual photosensitivity threshold of the subject.

An ophthalmic apparatus of an aspect example includes an image acquiring unit, a corneal shape estimating processor, and a first image correcting processor. The image acquiring unit is configured to acquire an anterior segment image constructed based on data collected from an anterior segment of a subject's eye by optical coherence tomography (OCT) scanning. The anterior segment image includes a missing part corresponding to a part of a cornea. The corneal shape estimating processor is configured to estimate a shape of the missing part of a cornea image by analyzing the anterior segment image acquired by the image acquiring unit. The first image correcting processor is configured to correct distortion of the anterior segment image based at least on the shape of the missing part estimated by the corneal shape estimating processor.

Disclosed in the present invention is a head-mounted electronic vision aid device and a visual distortion correction method thereof. A display unit is configured to movably display a grid/grid group, a user input unit is configured to select at least one to-be-corrected part in the grid/grid group according to the real-time image feedback information viewed by a user, when the to-be-corrected part is selected, the user input unit sends a correction control signal for performing image correction on the to-be-corrected part in a coordinate system where the grid/grid group is currently located to a processing unit, the processing unit performs calculation processing on the correction control signal to obtain variations of the to-be-corrected part before and after correction in the coordinate system, a storage unit stores plurality of combinations of the variations of the to-be-corrected part, and a display unit can display an image after visual distortion correction according to the plurality of combinations of the variations stored in the storage unit. Compared with the prior art, visual distortion correction can be achieved quickly and intuitively, and the demands of low-vision users with different symptom progresses are met.

A fundus imaging apparatus includes an illumination apparatus including a light source and an illumination optical system, and an imaging apparatus including an image sensor and an imaging optical system. The illumination optical system irradiates a fundus with light from the light source. The imaging optical system forms an image of the fundus on the image sensor. An optical axis of the illumination optical system does not match an optical axis of the imaging optical system, or the illumination optical system does not have a specific optical axis.

An interpupillary distance measuring method, a wearable ophthalmic device and a computer readable storage medium are provided. The method includes: capturing at least one eye image; extracting corresponding one or two pupil image positions corresponding to a monocular pupil or pupils to two eyes in the at least one eye image; and determining an actual distance between the pupils of two eyes according to the one or two pupil image positions.

A system includes glasses for executing a process to correct the alignment of an eye if a misalignment condition is detected. The glasses include lens that change opacity as instructed by a processor. The system determines that an eye is not aligned correctly based on data captured by one or more sensors in the glasses. Data is captured periodically and compared to a baseline set of data. If a deviation is detected, then the appropriate lens is turned “ON” to shade the aligned eye, thereby forcing the misaligned eye to properly align itself.

A subjective optometry apparatus includes an optometry unit having an optical member, being located in front of a subject eye, and changing optical characteristics of a target light flus with using the optical member, and a measurement optical system that has a light projecting optical system for applying measurement light emitted from a measurement light source to a fundus of the subject eye through the optometry unit, and a light receiving optical system in which a detector receives reflected light of the measurement light reflected on the fundus of the subject eye through the optometry unit, and that objectively measures the optical characteristics of the subject eye. An optical axis of the measurement optical system is set to be off-axis from an optical axis of the optical member in the optometry unit.

An ophthalmic apparatus includes an illumination optical system, an optical scanner, an imaging optical system, a controller, and an image forming unit. The illumination optical system is configured to generate slit-shaped illumination light. The optical scanner is configured to deflect the illumination light to guide the illumination light to a fundus of a subject's eye. The imaging optical system is configured to guide returning light of the illumination light from the fundus to an image sensor. The controller is configured to control the optical scanner. The image forming unit is configured to form an image of the fundus based on a light receiving result captured in an imaging target region on a light receiving surface of the image sensor. The image sensor is configured to capture the light receiving result in an opening region on the light receiving surface using a rolling shutter method, the opening region corresponding to an illumination region of the illumination light on the fundus, the illumination region being moved in a predetermined scan direction by the optical scanner. The controller is configured to control the optical scanner so that irradiation times of the returning light at a plurality of light receiving elements in the imaging target region are substantially equal.