A method for non-invasive assessment of photoreceptor function in a mammalian subject comprises exposing a subject's eye to a visible light stimulus to initiate an intrinsic reflectance response in one or a population of photoreceptors and capturing multiple images of photoreceptor's intrinsic reflectance response to the stimulus. Patterns of variability in the intrinsic reflectance response of a single photoreceptor or population of photoreceptors are useful in diagnosis and treatment monitoring of an ocular condition, disease, disorder or a response to treatment for said ocular condition, disease or disorder.

The disclosure provides a system that may receive an identification of a first patient; may retrieve, based at least on the identification of the first patient, first eye identification information that includes a first plurality of iris structures associated with a first eye of the first patient; may determine a second plurality of iris structures of an eye of a current patient; may determine if the second plurality of iris structures match the first plurality of iris structures; if the second plurality of iris structures match the first plurality of iris structures, may provide an indication that the first eye has been correctly identified; and if the second plurality of iris structures do match the first plurality of iris structures, may provide an indication that the first eye has not been correctly identified.

A head mounted display includes a display layer, an array of light sources, a first optical combiner, and a second optical combiner. The array of light sources are configured to be selectively enabled to emit non-visible light to illuminate a fundus of an eye. The first optical combiner is configured to receive reflected non-visible light that is reflected by the eye, direct a first component of the reflected non-visible light to a first camera to generate an image of the eye, and pass a second component of the reflected non-visible light. The second optical combiner is configured to receive a fundus imaging light responsive to the second component of the reflected non-visible light, and to direct the fundus imaging light to a second camera to generate an image of the fundus.

A head mounted display includes a display layer, an array of light sources, a first optical combiner, and a second optical combiner. The array of light sources are configured to be selectively enabled to emit non-visible light to illuminate a fundus of an eye. The first optical combiner is configured to receive reflected non-visible light that is reflected by the eye, direct a first component of the reflected non-visible light to a first camera to generate an image of the eye, and pass a second component of the reflected non-visible light. The second optical combiner is configured to receive a fundus imaging light responsive to the second component of the reflected non-visible light, and to direct the fundus imaging light to a second camera to generate an image of the fundus.

To provide a display apparatus that makes it possible to further improve a performance in controlling video presentation according to characteristics of an eyeball of a user. A display apparatus is provided that includes a light source; a processor that performs processing on a distribution of characteristics of an eyeball; a monitoring section that monitors a state of the eyeball; a matching section that performs matching on the distribution of the characteristics of the eyeball and the state of the eyeball; and an irradiator that irradiates a specified position on a retina with video display light emitted by the light source.

Improved optical coherence tomography systems and methods to measure thickness of the retina are presented. The systems may be compact, handheld, provide in-home monitoring, allow the patient to measure himself or herself, and be robust enough to be dropped while still measuring the retina reliably.

An optical device can include: an incident light polarizer positioned to receive incident light and configured to polarize incident light such that polarized incident light is directed to a cornea of a subject; at least one corneal light polarizer, wherein the at least one corneal light polarizer is positioned to receive reflected light from the cornea of the subject and polarize the reflected light to a second polarization; at least one rotating mechanism; and at least one receiver. The receiver can be at least one viewing port optically coupled with the at least one corneal light polarizer or an imaging device (e.g., optical detector). The at least one rotating mechanism is: coupled with the incident light polarizer; coupled with the at least one corneal light polarizer; or coupled with the incident light polarizer and the at least one corneal light polarizer.

An optical device can include: an incident light polarizer positioned to receive incident light and configured to polarize incident light such that polarized incident light is directed to a cornea of a subject; at least one corneal light polarizer, wherein the at least one corneal light polarizer is positioned to receive reflected light from the cornea of the subject and polarize the reflected light to a second polarization; at least one rotating mechanism; and at least one receiver. The receiver can be at least one viewing port optically coupled with the at least one corneal light polarizer or an imaging device (e.g., optical detector). The at least one rotating mechanism is: coupled with the incident light polarizer; coupled with the at least one corneal light polarizer; or coupled with the incident light polarizer and the at least one corneal light polarizer.

A fundus camera includes an objective lens, an illumination device, an imaging lens group and an image sensor. The illumination device has a light emitting position and includes a plurality of light emitting modules and a driving element. Each light emitting module generates a corresponding illumination light, and the optical characteristics of the illumination lights are different from each other. The driving element drives one of the light emitting modules to the light emitting position of the illumination device to output an illumination light with required optical characteristics and irradiate it to a fundus through the objective lens. The imaging light reflected by the fundus passes through the objective lens and the imaging lens group to form an image on the image sensor so as to generate a fundus image. The abovementioned fundus camera has a compact structure and can switch the illumination light sources in a short time to obtain fundus images with different optical characteristics.

A fundus camera includes an objective lens, an illumination device, an imaging lens group and an image sensor. The illumination device has a light emitting position and includes a plurality of light emitting modules and a driving element. Each light emitting module generates a corresponding illumination light, and the optical characteristics of the illumination lights are different from each other. The driving element drives one of the light emitting modules to the light emitting position of the illumination device to output an illumination light with required optical characteristics and irradiate it to a fundus through the objective lens. The imaging light reflected by the fundus passes through the objective lens and the imaging lens group to form an image on the image sensor so as to generate a fundus image. The abovementioned fundus camera has a compact structure and can switch the illumination light sources in a short time to obtain fundus images with different optical characteristics.