Methods and devices for interactive adjustment of a parameter of a continuously variable optical lens
A method for interactive adjustment of a parameter of a continuously variable optical lens involving having a subject view an eye chart through a variable lens frame comprising at least one continuously variable optical lens, applying a modulation to a selected parameter of said continuously variable optical lens around an average value, and tuning said average value by minimizing the flickering visible to the subject and due to the modulation.
1. A method for interactive adjustment of a parameter of a continuously variable optical lens comprising:
having a subject view an eye chart through a variable lens frame comprising at least one continuously variable optical lens;
generating a flickering visible to the subject by applying a temporal modulation to a selected parameter of said continuously variable optical lens around an average value; and
tuning said average value to minimize the flickering.
2. The method according to claim 1 , further comprising:
measuring an optometric correction to be applied to a subject, based on the measure of the average value of a parameter that minimize the flickering.
3. The method according to claim 1 , wherein a selected parameter is one selected from a group consisting of defocus, amplitude of astigmatism and orientation of astigmatism.
4. The method according to claim 1 , wherein the selected parameter is one of the Zernike components Z 2 +2 and Z 2 −2 relative to astigmatism.
5. The method according to claim 1 , implemented in a binocular vision test, wherein each eye views an eye chart through a continuously variable optical lens.
6. The method according to claim 4 , wherein a strong defocus is applied to one eye while the other eye is being tested.
7. The method according to claim 4 , wherein two images are generated using a 3D display and sent each on a subject's eye.
8. The method according to claim 1 , wherein an image is modulated synchronously with the modulations of the selected parameter of the variable optical lens.
9. The method according to claim 1 , for interactive adjustment of an eyepiece in an optical instrument, wherein the eyepiece comprises at least one continuously variable optical lens.
10. The method according to claim 1 , wherein the variable optical lens comprises a multi electrodes liquid lens based on electrowetting.
11. A device for optometric measurements, comprising:
a variable lens frame comprising at least one electronically continuously variable optical lens, wherein a subject is intended to view an eye chart through said at least one continuously variable optical lens;
means for generating a flickering visible to the subject by applying a temporal modulation to a selected parameter of said continuously variable optical lens around an average value; and
means for tuning said average value to minimize the flickering.
12. The device according to claim 11 , further comprising a control unit to control the variable optical lens physically or by a remote wireless communication using control input(s).
13. The device according to claim 11 , wherein the continuously variable optical lens is a multi electrodes liquid lens based on electrowetting.
14. The device according to claim 11 , further comprising a 3D display to generate two images, one in each subject's eye.
15. The device according to claim 11 , further comprising a voice recognition interface.