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.

A method for collecting biometric measurement data of an eye on the basis of different measurement modalities, allowing for physiologically correct, representative, and robust biometric measurement data. In the method, the measurement data for individual measurement variables and the dynamic behavior of the eye are recorded continuously at the highest possible repetition rate over the measurement time. The individual phases of the dynamics of the eye which define the limits of the phase for stable vision are analyzed on the basis of the measurement values, and only the measurement data for the individual measurement variables are output which have been detected during the phase for stable vision. Although the proposed method is provided for collecting biometric measurement data in preparation for a cataract operation, the method can also be applied to other areas of ophthalmology to generate error-free measurement data or recordings of the eye.

A method for collecting biometric measurement data of an eye on the basis of different measurement modalities, allowing for physiologically correct, representative, and robust biometric measurement data. In the method, the measurement data for individual measurement variables and the dynamic behavior of the eye are recorded continuously at the highest possible repetition rate over the measurement time. The individual phases of the dynamics of the eye which define the limits of the phase for stable vision are analyzed on the basis of the measurement values, and only the measurement data for the individual measurement variables are output which have been detected during the phase for stable vision. Although the proposed method is provided for collecting biometric measurement data in preparation for a cataract operation, the method can also be applied to other areas of ophthalmology to generate error-free measurement data or recordings of the eye.

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.

Disclosed embodiments may include a device, system and method for providing a low cost device that can measure refractive errors very accurately via attachment to a smart phone. A disclosed device may use ambient light or a light source in simulating the cross cylinder procedure that optometrists use by utilizing the inverse Shack-Hartman technique. The optical device may include an array of lenslets and pinholes that will force the user to effectively focus at different depths. Using an optical device, in conjunction with a smart phone, the user first changes the angle of the axis until he/she sees a cross pattern (the vertical and horizontal lines are equally spaced). The user adjusts the display, typically using the controls on the smartphone, to make the lines come together and overlap, which corresponds to bringing the view into sharp focus, thus determining the appropriate optical prescription for the user.

Disclosed embodiments may include a device, system and method for providing a low cost device that can measure refractive errors very accurately via attachment to a smart phone. A disclosed device may use ambient light or a light source in simulating the cross cylinder procedure that optometrists use by utilizing the inverse Shack-Hartman technique. The optical device may include an array of lenslets and pinholes that will force the user to effectively focus at different depths. Using an optical device, in conjunction with a smart phone, the user first changes the angle of the axis until he/she sees a cross pattern (the vertical and horizontal lines are equally spaced). The user adjusts the display, typically using the controls on the smartphone, to make the lines come together and overlap, which corresponds to bringing the view into sharp focus, thus determining the appropriate optical prescription for the user.

A system for determining a prescription for an eye of a person, the system being configured to communicate with a mobile device including at least one first light source adapted to illuminate the eye with first light having a first optical wavelength, at least one second light source adapted to illuminate the eye with second light having a second optical wavelength different from the first wavelength, and a processor that measures the photorefraction of the eye at the first wavelength based on at least one picture of the eye recorded when illuminating the eye with first light, measures the photorefraction of the eye at the second wavelength based on at least one picture of the eye recorded when illuminating the eye with second light, determines the prescription for the eye based on the measured photorefraction at the first wavelength and the measured photorefraction at the second wavelength.

A system for determining a prescription for an eye of a person, the system being configured to communicate with a mobile device including at least one first light source adapted to illuminate the eye with first light having a first optical wavelength, at least one second light source adapted to illuminate the eye with second light having a second optical wavelength different from the first wavelength, and a processor that measures the photorefraction of the eye at the first wavelength based on at least one picture of the eye recorded when illuminating the eye with first light, measures the photorefraction of the eye at the second wavelength based on at least one picture of the eye recorded when illuminating the eye with second light, determines the prescription for the eye based on the measured photorefraction at the first wavelength and the measured photorefraction at the second wavelength.

An ophthalmologic apparatus includes an objective lens, a refractive power measurement optical system, an inspection optical system, and a corneal shape measurement optical system. The refractive power measurement optical system projects light onto a subject's eye via the objective lens and detects returning light from the subject's eye. The inspection optical system includes an optical scanner. The inspection optical system deflects light from a light source, projects the light deflected by the optical scanner onto the subject's eye via the objective lens, and detects returning light from the subject's eye. The corneal shape measurement optical system projects an arc-like or circumferential measurement pattern from an outer edge side of the objective lens onto the subject's eye and detects returning light from a cornea of the subject's eye. When a working distance is WD, a distance from a corneal apex of the subject's eye to a pupil of the subject's eye is d1, a distance from the pupil to a fundus of the subject's eye is d2, and a scan range by the optical scanner is SA square, a diameter of the objective lens is greater than or equal to ((WD+d1)×SA/d2).

An ophthalmologic apparatus includes an objective lens, a refractive power measurement optical system, an inspection optical system, and a corneal shape measurement optical system. The refractive power measurement optical system projects light onto a subject's eye via the objective lens and detects returning light from the subject's eye. The inspection optical system includes an optical scanner. The inspection optical system deflects light from a light source, projects the light deflected by the optical scanner onto the subject's eye via the objective lens, and detects returning light from the subject's eye. The corneal shape measurement optical system projects an arc-like or circumferential measurement pattern from an outer edge side of the objective lens onto the subject's eye and detects returning light from a cornea of the subject's eye. When a working distance is WD, a distance from a corneal apex of the subject's eye to a pupil of the subject's eye is d1, a distance from the pupil to a fundus of the subject's eye is d2, and a scan range by the optical scanner is SA square, a diameter of the objective lens is greater than or equal to ((WD+d1)×SA/d2).