Method and system for determining the subjective refraction properties of an eye
AssigneeCarl Zeiss Vision International GmbH
InventorsArne Ohlendorf, Siegfried Wahl, Jesús-Miguel Cabeza Guillén
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Abstract
A system determines the subjective refraction properties of an eye of a test subject perceiving a natural image. The system contains a memory in which at least one natural image is stored; a display device for displaying the at least one natural image from the memory; and a lens arrangement for adjusting various light-refracting elements in an optical path between the eye of the test subject and the display device. The lens arrangement is arranged at a predefined distance from the display device. A corresponding method and the use of a natural image for refraction determination are also disclosed.
Claims19
A system for determining the subjective refraction properties of an eye of a subject based on a utilization of a natural image, the system comprising:
- a memory device configured to store at least one natural image;
- a display apparatus configured to display the at least one natural image stored in the memory device;
- and
- an optics arrangement configured to insert at least one light-refracting element from a plurality of light-refracting elements into an optical path between the subject's eye and the display apparatus;
- wherein the optics arrangement is arranged at a predetermined distance from the display apparatus, and
- wherein the natural image includes at least two regions having different spatial frequencies, respectively, and
- wherein the natural image depicts a natural scenery.
A method for determining subjective refraction properties of an eye of a subject perceiving a natural image, the method comprising:
- providing a system configured to determine the subjective refraction properties of an eye of a subject perceiving a natural image, the system including:
- a memory device configured to store at least one natural image;
- a display apparatus configured to display the at least one natural image stored on the memory device;
- and
- an optics arrangement configured to insert at least one light-refracting element from a plurality of light-refracting elements in an optical path between the subject's eye and the display apparatus;
- arranging the optics arrangement at a predetermined distance from the display apparatus;
- displaying the at least one natural image stored in the memory device on the display apparatus;
- placing different light-refracting elements from the plurality of light elements in the optical path between the subject's eye and the display apparatus with the optics arrangement;
- and
- providing the natural image with at least two regions having different spatial frequencies, wherein the natural image depicts a natural scenery.
A system for determining the subjective refraction properties of an eye of a subject based on a utilization of a natural image, the system comprising:
- a memory device configured to store at least one natural image;
- a display apparatus configured to display the at least one natural image stored in the memory device;
- and
- an optics arrangement configured to insert at least one light-refracting element from a plurality of light-refracting elements into an optical path between the subject's eye and the display apparatus;
- wherein the optics arrangement is arranged at a predetermined distance from the display apparatus, and
- wherein the natural image includes a plurality of image regions, wherein different image regions have different spatial frequencies and wherein the natural image depicts a natural scenery.
A method for determining subjective refraction properties of an eye of a subject perceiving a natural image, the method comprising:
- providing a natural image with a plurality of image regions;
- displaying the natural image to the subject at a first distance;
- arranging a first light-refracting element at a second distance in an optical path between the subject's eye and the natural image;
- replacing the first light-refracting element with a second light-refracting element at the second distance in the optical path between the subject's eye and the natural image;
- receiving a description of at least one image region from among the plurality of image regions from the subject;
- and
- determining the subjective refraction properties of the eye of the subject perceiving the natural image, wherein different image regions from among the plurality of image regions have different spatial frequencies and wherein the natural image depicts a natural scenery.
Dependencies are inferred from the claim text.