A portable apparatus for determining refractive error in the human eye comprises an elongate base rail having a left side base rail portion and a right side base rail portion; a first lens carrier housing mounted on the left side base rail portion, a first lens carrier carrying a plurality of corrective lenses and being substantially housed within the first lens carrier housing so as to expose a corrective lens of the first lens carrier in a test position of the first lens carrier housing; a second lens carrier housing mounted on the right side base rail portion, a second lens carrier carrying a plurality of corrective lenses and being substantially housed within the second lens carrier housing so as to expose a corrective lens of the second lens carrier in a test position of the second lens carrier housing; a first user operable control adapted for moving the first lens carrier relative to the first lens carrier housing and a second user operable control adapted to move the second lens carrier relative to the second lens carrier housing, whereby the first user operable control and the second user operable control are each movable to select a corrective lens to be exposed in the test position of the respective carrier housing. and wherein the portable apparatus includes at least one of (a) the base rail is adapted to be foldable at a middle portion thereof and (b) one of the first lens carrier housing and the second lens carrier housing is detachable from the respective left side base rail portion or right side base rail portion.

Ergonomic refraction station and procedure of use consists of a phoropter helmet, chair, work table, monitor and electronic circuit, which seeks to perform a refraction test in the conditions most similar to the usual work environment of the patient, for this it consists of a lightweight phoropter helmet, which adjusts to the size of the user, made of transparent material to allow contact with its surroundings and execute the usual movements of head, neck, eyes and working distance, parameters that are captured by optical, distance and inclination sensors, located on the phoropter helmet or on the flexible and adjustable table with “swan neck” arms.

Configurations are disclosed for a health system to be used in various healthcare applications, e.g., for patient diagnostics, monitoring, and/or therapy. The health system may comprise a light generation module to transmit light or an image to a user, one or more sensors to detect a physiological parameter of the user's body, including their eyes, and processing circuitry to analyze an input received in response to the presented images to determine one or more health conditions or defects.

The invention relates to cylindrical tunable fluidic lenses. The cylindrical optical power of the lenses may be continuously tuned within at least ±10 diopters, without inducing any significant spherical aberration, or any other significant aberrations. The lenses feature a geometry that produces minimal or no spherical defocus. These cylindrical tunable fluidic lenses could be used to induce and/or correct cylindrical optical aberrations in adaptive optical systems, particularly in ophthalmologic applications related to objective and automatic assessment of the refractive error of the eye, without the need of receiving feedback from the subjects.

An apparatus and method for determining at least one visual refraction feature of a subject by showing a visual stimulus to the subject. The apparatus includes an optical system arranged on an optical path between an eye of the subject and the visual stimulus, the optical system being adapted to provide an optical power that is continuously variable as a function of time (t), a control unit for driving the optical power of the optical system and an input device adapted for recording a response of the subject relative to a sharpness of the visual stimulus seen through the optical system, the control unit being adapted to adjust a speed of variation of the optical power (S) as a function of the response recorded.

A vision testing device includes a light-occluding casing for administering vision tests. A viewing station is coupled to the light-occluding casing so a test subject can see a first digital display housed within the light-occluding casing. A second digital display is external to the light-occluding casing and is configured to receive touch-based input. One or more predetermined vision tests are displayed via the first digital display. The second digital display receives input corresponding to the vision test displayed via the first digital display. The second digital display includes response indicators that can be activated via a swiping motion on the second digital display, and a response is recorded as a result of the swiping motion. Each answer corresponding to a swiping motion is stored and output as a result of the vision test.

An ophthalmic technician is present with a patient in an exam room to operate eye examination equipment and transmit patient information to remote location. At that remote location, a skilled technician is present to provide the necessary optical care, and may operate the phoropter from the remote location. Using video and/or teleconferencing equipment and a phoropter located in the patient examination room along with management software, the system works to determine the final optical prescription for the patient. That information, coupled with findings from other devices which are integrated with the management software, and that the patient uses locally, are reviewed by a remote-based optometrist or ophthalmologist.

An ophthalmologic apparatus includes a visual target projection system that is configured to present a visual target to a subject eye at a predetermined examination distance under a presentation condition according to the examination distance, and a controller that is configured to control the visual target projection system. The controller is configured to control the visual target projection system to present the visual target at a first examination distance for a far-point examination of the subject eye, a second examination distance for a near-point examination of the subject eye, and at least one third examination distance different from the first examination distance and the second examination distance.

Described are various embodiments of a light field device and vision-based testing system using same. Different embodiments provide for a vision-based testing device comprising a one or more view zone optimization techniques such as, but not limited to, a predominant view zone isolator, a view zone output realignment solution, and a coarse view zone adjustment transfer solution, as well as other view zone artefact reduction techniques and multi-depth perception adjustment techniques.

Disclosed is an apparatus for measuring subjective ocular refraction including a display device configured to display a least one optotype and a refractive optical system arranged between an eye of a viewer and the display device, the refractive optical system having an optical power that can be varied according to a determined minimum step. The display device further includes a unit for varying optical power designed to generate a variation in the spherical and/or cylindrical optical power, such that the display device and the refractive optical system form a first image of the optotype with a first total optical power and, respectively, a second image of the optotype with a second total optical power, the variation in optical power between the first total optical power and the second total optical power being less than the determined minimum step.