An eye tracking system includes at least two cameras configured to register eye images of at least one eye. The system obtains eye images from at least one camera in a subset of the at least two cameras, determines a first pupil parameter based on a first eye image, and determines a second pupil parameter based on a second eye image. The system compares the first and second pupil parameters to obtain a test parameter and checks the test parameter against at least one operation criterion. Responsive to the checking, the system assigns a respective operation state to at least one camera in the subset. The operation state involves one of (A) operating the camera at a high frame rate, (B) operating the camera at a reduced frame rate being lower than high frame rate, (C) the camera being in a standby mode or (D) the camera being powered off.

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.

Disclosed is an eye examination apparatus that can be used in professional settings. The eye examination apparatus has a body having a first eye opening and a second eye opening for a user to see into the eye examination apparatus using two eyes. The eye examination apparatus also has a first camera coupled to the body and positioned to acquire ophthalmic images through the first eye opening, and a second camera coupled to the body and positioned to acquire ophthalmic images through the second eye opening. The eye examination apparatus also has at least one display coupled to the body and positioned to be viewable through the first eye opening and the second eye opening.

An optometry system for examining a subject eye of an examinee includes an optometry device for examining the subject eye, an imaging unit that captures an image of an examination room including the examinee and the optometry device, and a remote operation unit that includes a display unit which displays an operation screen for operating the optometry device and an captured image captured by the imaging unit, and a display control unit which controls display of the display unit to display the operation screen and the captured image on the display unit. The remote operation unit enables an examiner to observe the captured image displayed on the display unit to guide the examinee to an examination position.

Disclosed is an eye examination apparatus for use with a smartphone. The eye examination apparatus has a body having a first eye opening and a second eye opening for a user to see into the eye examination apparatus using two eyes. In accordance with an embodiment of the disclosure, the eye examination apparatus has a coupling for receiving a smartphone having a display and a camera and for holding the smartphone in a predefined position in relation to the body, such that the camera of the smartphone is positioned to acquire ophthalmic images through the first eye opening, and the display of the smartphone is viewable through the second eye opening. In this manner, it is possible for the user to have an eye examination performed remotely outside of a clinician's office without specialized equipment by instead using their own smartphone.

A slit projector for generating slit illumination in an eye, including a light source, a slit forming unit and an imaging optical unit along a beam path. The invention facilitates improved freedom to operate in the treatment field. The slit projector includes a mirror arranged between the slit forming unit and the imaging optical unit. A corresponding positioning apparatus facilitates aligning the slit illumination in the eye for a therapy system with a surgical microscope and a slit projector. The positioning apparatus includes a holding element and a fastening element, which can be connected to the surgical microscope and the slit projector, respectively, and a pivoting element including a first connection, by use of which the pivoting element and the holding element are movably connected, and a second connection, by use of which the pivoting element and the fastening element are movably connected.

An automatic eye test device and an automatic eye test method are disclosed. The automatic eye test device includes an automatic positioning module, an automatic test module and an automatic analysis module. The automatic positioning module is configured to automatically complete positioning of an eye of a person to be tested. The automatic test module is coupled to the positioning module and configured to automatically test the eye of the person to be tested to obtain a test result. The automatic analysis module is coupled to the automatic test module and configured to automatically analyze the test result to provide a personalized test suggestion for the person to be tested.

An instrument includes a housing with a lower hand-held portion having a user-input button and a display for displaying an MPOD score for the user. The instrument further includes a viewing tube coupled to the hand-held portion. The viewing tube terminates in an eye cup. The viewing tube is transverse to the lower hand-held portion and transmits light from a first light source towards a reflector and is reflected off the reflector through an aperture in a blocking wall and in a direction toward the macula. The first light source is an LED and provides two colored lights alternating at a frequency to create a flicker. The frequency is used to determine an amount of macular pigment of the macula of the user. A second light source is located in the first portion of the viewing tube and configured to illuminate a surface of the blocking wall.

An optical measurement apparatus for an eyeball, the optical measurement apparatus includes: a light reflecting unit that reflects light in a direction where the light passes across an anterior chamber of the eyeball; and a switching unit that switches an incident position of the light to the light reflecting unit so as to inhibit the light from being moved from a state in which the light passes across the anterior chamber.

A method and apparatus is provided for providing a barrier for a user of an optical assembly. The optical assembly includes headgear and an optic within a housing. The apparatus includes the barrier including a protective shield defining an opening. The apparatus also includes a mounting fixture configured to attach the protective shield to the optical assembly such that the opening is aligned with an optical axis of the optic to provide an unobstructed path for light to the optic through the opening. The apparatus also includes an adaptive coupling positioned in a gap between the protective shield and the housing and configured to engage the protective shield adjacent the opening to form an airtight seal in the gap between the protective shield and the housing. A method is also provided for installing the apparatus to the optical assembly.