A mobile communication device-based corneal topography system includes an illumination system, an imaging system, a topography processor, an image sensor, and a mobile communication device. The illumination system is configured to generate an illumination pattern reflected off a cornea of a subject. The imaging system is coupled to an image sensor to capture an image of the reflected illumination pattern. A topography processor is coupled to the image sensor to process the image of the reflected illumination pattern. The mobile communications device includes a display, the mobile communications device is operatively coupled to the image sensor. The mobile communications device includes a mobile communications device (MCD) processor. A housing at least partially encloses one or more of the illumination system, the imaging system, or the topography processor.

A ophthalmic fixation apparatus includes a case housing with an interior area to hold a power source, the case housing further having a switch to activate a first fixation element and a second fixation element; one or more straps extending from the case housing; a first flexible conduit extending from the case housing and to facilitate direction of the first fixation element; and a second flexible conduit extending from the case housing and to facilitate direction of the second fixation element; the ophthalmic apparatus is for use during an eye exam to keep the patient's attention and maintain a still eye for examination.

A method of laser eye surgery including linking retinal vessel architecture to corneal topography. This enables registration of the steep axis of the cornea in order to orient a toric intraocular lens, and/or to place astigmatic keratotomy incisions. First, a detailed pre-operative retinal image of the vasculature of the retina is obtained. In addition, a pre-operative image of the topography of the eye is obtained. The retinal image is then correlated or superimposed on the topography image to provide a reference. After the patient lies down under the laser eye surgery system, and during the surgery, the retinal vasculature is monitored which provides a reference to the surgery system about the topography of the eye. This process enables registration of the steep axis of the cornea in order to orient a toric intraocular lens and/or to place astigmatic keratotomy incisions.

A mask for performing an eye exam of a subject includes one or more optically transparent sections for transmitting an incident light beam therethrough and incident on the subject's eye. In some embodiments, the one or more optically transparent sections are coated with an anti-reflective coating configured to reduce reflection of the incident light beam by the one or more optically transparent sections. In some embodiments, the one or more optically transparent sections may have a portion thereof that is tilted with respect to the incident light beam when the mask is optically interfaced with the docking portion of an ophthalmic instrument, such that the incident light beam forms a finite angle of incidence with respect to the corresponding portion of the optically transparent sections.

A retinal imaging system is provided. The system comprises: a fundus camera having a focusing mechanism; an imaging module configured for imaging user's face and eyes and providing image date indicative of a relative orientation between an optical axis of the fundus camera and a line of sight of user's eye at user's eye target position; a position and alignment system configured and operable to utilize the image data indicative of said relative orientation for positioning the fundus camera at an operative position such that the optical axis substantially coincides with the line of sight of user's eye, to enable focusing the fundus camera on the retina; a sensing system comprising one or more sensors, configured and operable for monitoring a user's face position with respect to a predetermined registration position and generating corresponding sensing data; and a safety controller configured and operable to be responsive to the sensing data, and upon identifying that the user's face position with respect to the predetermined registration position

A light shielding system configured to shield at least one eye of a patient from incident light for an electroretinogram includes a substantially lighttight shielding box enclosing an inner space arranged to receive a handheld Ganzfeld stimulator, which box is mountable over the at least one eye of the patient; the box including at least one sleeve extending into the box to allow manipulation of the Ganzfeld stimulator.

A self service refraction instrument includes an adjustable optical assembly coupled within an instrument housing between an eyepiece and a viewing target display. A defocus correcting component includes a pair of adjustably spaced apart spherical lens elements. An astigmatism correcting component includes a pair of cylindrical lens elements that are synchronously rotatable in opposite directions for adjusting cylinder power and in a same direction for adjusting axis angle. A decision module informed by visual acuity scores for an autorefraction Rx or an old prescription Rx of a test subject, the test subject's communicated choices among presented options of corrective optics prescriptions and a refraction rules database that decides to next test sphere, axis or cylinder, at a specific step size of increments, or to test visual acuity, or to end a test.

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.

A headrest for an ophthalmic instrument facilitates fine positioning of the instrument relative to an eye of a test subject without the need to remove a contact element of the headrest from contact with the test subject's face. The ophthalmic instrument may be, for example, a rebound tonometer or a non-contact tonometer. The headrest includes a hollow bulbous contact element formed of resiliently deformable material, for example a thermoplastic elastomer (TPE) or silicone rubber. An outer surface of the contact element may have a spherical shape or a spheroidal shape when the contact element is not deformed.

An apparatus for measuring eyelid tension includes: a cylindrical body; a measuring sensor formed on an outer circumferential surface of the body; and a contact part formed at a longitudinal distal end of the body to come into contact with the body of a person to be measured.