A selling server stores prescription data of a customer transmitted from an optometrist terminal of an optometrist who performs optometry for a glasses prescription through a communication line in association with customer identification information, transmits image data of a frame candidate group of glasses to a customer terminal, transmits image data of a lens candidate group of the glasses to the customer terminal, receives information relating to a frame and a lens purchased by the customer and determined on the basis of a combined image of a frame image selected by the customer, a lens image selected by the customer, and a face image of the customer, and transmits prescription data of the customer to a lens company terminal of a lens company which processes the lens purchased by the customer.

A visual line detection apparatus includes a light source, a position detection unit configured to detect positions of pupil centers and positions of corneal reflection centers, a curvature radius calculation unit configured to calculate corneal curvature radii from a position of the light source and the positions of the corneal reflection centers, a viewpoint detection unit configured to detect viewpoints from the positions of the pupil centers and the corneal curvature radii, an extraction unit configured to extract pupil parameters indicating sizes of the pupils of the right and left respective eyeballs from the image of the eyeballs, and a correction unit configured to correct the viewpoint of the left eyeball and the viewpoint of the right eyeball on the basis of the pupil parameters and calculate a synthesized viewpoint.

A retinal scanning type eye examination device includes a storage unit configured to store test image data; a laser emitting unit including a laser light source configured to generate an imaging laser beam based on the test image data, the laser emitting unit being configured to project a test image onto a retina of an eyeball of a person subjected to an eye examination by using the imaging laser beam; an optical component configured to cause the imaging laser beam to converge at an inside of the eyeball of the person; a parameter acquiring unit configured to acquire parameter information for a retinal scanning type eyewear, the parameter information including angle information indicating a rotation angle of the laser emitting unit when the laser emitting unit is rotated around a converging point of the laser beam; and an output unit configured to output the parameter information to an external device.

A visual performance examination device includes an image data obtaining unit that obtains image data of the right eye and image data of the left eye of a test subject who is irradiated with a detection light emitted from a light source; a position calculating unit that, based on the image data of the right eye, calculates first-type relative position data indicating the relative position between the pupil and the corneal reflex of the right eye, and, based on the image data of the left eye, calculates second-type relative position data indicating the relative position between the pupil and the corneal reflex of the left eye; and an evaluating unit that, based on the first-type relative position data and the second-type relative position data, outputs evaluation data about the visual performance of the test subject.

The present invention is directed to a system that may be incorporated into currently available electronic devices such as laptops, cell-phones and tablets, that help the user to maintain a viewing distance that is safe for the eyes. In order to avoid near-point stress on the eyes which may lead to the onset of myopia and/or accelerate the progression of myopia, especially in children or young adults, the system of the present invention monitors viewing distance and automatically distorts the image and/or text display into a format that is unreadable, for example, through blurring or pixilation, when the device is too close to the viewer. Alternatively, the system may automatically turn off the display when the device is too close and turn the display on when the device is at the proper viewing distance.

Disclosed are a method and device for adjusting a pupil distance of a virtual reality display device. The method adjusts a second pupil distance on a virtual reality display device by means of a first pupil distance of a user wearing the virtual reality display device, the first pupil distance referring to a pupil distance of the user wearing the virtual reality display device, and the second pupil distance being used as a distance between focal points of two lenses of the virtual reality display device; the method comprises: detecting wether the first pupil distance and the second pupil distance match; if the first pupil distance and the second pupil distance do not match, then executing a preset matching operation on the virtual reality display device. The present application solves the technical problem of a virtual reality display device being bulky and heavy.

Systems and methods are disclosed for generating an eyewear frame and lens geometry that is customized to a user's anatomy and optimized for optical performance. One method includes receiving a configurable parametric model of a user-specific eyewear product comprising a frame portion and a lens portion, wherein geometric parameters of the configurable parametric model are based geometric features of a user's anatomy; receiving media data of a user, the media data including the user's response to visual cues; detecting the position of the user's eyes from the received media data; determining optical information of the user based on the detected position of the user's eyes; and generating an updated configurable parametric model by modifying the received configurable parametric model based on the determined optical information.

Disclosed is a method for testing the feasibility of a pair of spectacles, the pair of spectacles comprising an identified spectacle frame. The method includes steps of: a) acquiring a range of values of at least one first parameter relating to a spectacle wearer, in all of which range it is desired to ensure the feasibility of the pair of spectacles, b) acquiring a range of values of at least one second parameter that relates to a spectacle wearer and that is different from each first parameter, in all of which range it is desired to ensure the feasibility of the pair of spectacles, c) confirming, for a characteristic number of values of each second parameter, that the pair of spectacles is feasible whatever the value of each first parameter comprised in its range.

A wearable device may include a head-mounted display (HMD) for rendering a three-dimensional (3D) virtual object which appears to be located in an ambient environment of a user of the display. The relative positions of the HMD and one or more eyes of the user may not be in desired positions to receive, or register, image information outputted by the HMD. For example, the HMD-to-eye alignment vary for different users and may change over time (e.g., as a given user moves around or as the HMD slips or otherwise becomes displaced). The wearable device may determine a relative position or alignment between the HMD and the user's eyes. Based on the relative positions, the wearable device may determine if it is properly fitted to the user, may provide feedback on the quality of the fit to the user, and may take actions to reduce or minimize effects of any misalignment.

A method and apparatus for determining an interpupillary distance (IPD) are provided. To determine an IPD of a user, three-dimensional (3D) images for candidate IPDs may be generated, and user feedback on the 3D images may be received. A final IPD may be determined based on the user feedback.