Consumer products such as refraction measurement devices may be used for obtaining refraction measurements allow consumers to track their vision without visiting an optometrist or ophthalmologist. Such consumer products may work in concert with smart phones or other products having a touch screen that present images to refraction measurement devices. Smart phones may have resolution rates, sometimes measured as PPI or pixels per inch that are unknown to the user and/or refraction measurement device. One aspect of the invention is to provide an optical interface for the user to manually match the view port boundary of the smartphone to comport with the view port boundary of the refraction measurement device. Another aspect of the invention is the use of pre-distortion in images presented to the user. By noting the corrective movements exerted by the user upon the refractive measurement device, the user's own refractive error can be derived.

An instrument includes: an aberrometer; a corneal topographer; an optical coherence tomographer; and a fixation target subsystem. The fixation target subsystem includes a fixation target and a Stokes cell disposed in an optical path between the fixation target and the eye, wherein the Stokes cell includes a first rotation stage having a first cylinder lens and a second rotation stage having a second cylinder lens, wherein; and a controller configured for controlling a rotation of the first rotation stage and the second rotation stage for correcting for an astigmatism of the eye.

An ophthalmic device includes a first light source configured to output first light, a second light source configured to output second light, a first interferometer configured to acquire a first tomographic image of a first range based on first interference light, a second interferometer configured to acquire a second tomographic image of a second range based on second interference light, and a controller. The controller may be configured to perform a specific scan on a subject eye that scans the first light and the second light simultaneously in a same plane, wherein the first tomographic image and the second tomographic image are obtained by performing the specific scan, calculate an amount of distortion of the first tomographic image, correct the first tomographic image based on the amount of distortion, and correct the second tomographic image based on the amount of distortion.

A system and method including receiving, via an interface, demographic information and behavioral information associated with a subject; determining an incidence factor for the subject by weighting, according to a predetermined incidence formula, the demographic information and the behavioral information, wherein the predetermined incidence formula and weighting is derived from incidence data associated with a population; determining a progression factor for the subject by weighting, according to a predetermined progression formula, the demographic information and the behavioral information, wherein the predetermined progression formula and weighting is derived from progression data associated with a population, and wherein the predetermined progression formula is a function of the incidence factor; predicting and calculating based on the incidence factor and the progression factor, a myopia risk metric indicative of risk of the subject exhibiting myopia; and outputting the myopia risk metric as a numerical component.

A treatment apparatus for operatively correcting myopia or hyperopia in an eye includes a laser device controlled by a control device and that separates the corneal tissue by applying a laser beam. The control device controls the laser device to emit the laser beam into the cornea such that a lenticule-shaped volume is isolated in the cornea. The control device, when controlling the laser device, predefines the lenticule-shaped volume such that the volume has a minimum thickness of between 5 and 50 μm. For myopia correction, the minimum thickness occurs on the edge of the volume, and for hyperopia correction the minimum thickness occurs in the region of the visual axis.

A treatment apparatus for operatively correcting myopia or hyperopia in an eye includes a laser device controlled by a control device and that separates the corneal tissue by applying a laser beam. The control device controls the laser device to emit the laser beam into the cornea such that a lenticule-shaped volume is isolated in the cornea. The control device, when controlling the laser device, predefines the lenticule-shaped volume such that the volume has a minimum thickness of between 5 and 50 μm. For myopia correction, the minimum thickness occurs on the edge of the volume, and for hyperopia correction the minimum thickness occurs in the region of the visual axis.

A device and a method for determining an ocular aberration of at least one eye of a user are disclosed. The device contains a wavefront sensing unit for measuring at least one optical wavefront with at least one light beam, from which an ocular aberration of the at least one eye of the user is determined. The device further contains at least one diffractive element for generating multiple diffraction orders in the light beam in two meridians in a manner that the multiple diffraction orders are spatially separated on the wavefront sensing unit and in the eye of the user. The device and the method allow generating an ocular defocus map in a one-shot assessment in real-time, especially by employing an automated measurement of the ocular aberrations with regard to different eccentricities of the eye of the user in two meridians.

A presbyopia diagnosis apparatus includes: a measurement bar that is elongated along an axis in one direction, has a front end arranged to face the eyes of a subject for presbyopia measurement, and a rear end connected to a support, wherein a scale for measuring a distance is marked on the measurement bar; and a sliding unit that is movably installed on the measurement bar and has an installation groove formed therein, the installation groove for mounting a card for measuring presbyopia.

A system is disclosed for capturing diagnostic eye information. The system includes at least one energy source for directing electromagnetic energy into an eye of a subject, a plurality of perception units, each perception unit being associated with an associated position in the visual field of the eye, and each perception unit being adapted to capture refractive information from the eye responsive to the electromagnetic energy, and a processing system for determining refractive error information associated with each position of each perception unit in the visual field of the eye, and for determining refractive error composite information regarding the eye responsive to the refractive error information associated with each perception unit and independent of a direction of gaze of the eye.

A system is disclosed for capturing diagnostic eye information. The system includes at least one energy source for directing electromagnetic energy into an eye of a subject, a plurality of perception units, each perception unit being associated with an associated position in the visual field of the eye, and each perception unit being adapted to capture refractive information from the eye responsive to the electromagnetic energy, and a processing system for determining refractive error information associated with each position of each perception unit in the visual field of the eye, and for determining refractive error composite information regarding the eye responsive to the refractive error information associated with each perception unit and independent of a direction of gaze of the eye.