Patents Assigned to AIVISON PTY LTD
  • Vision testing for astigmatism
    Patent number: 9706911
    Abstract: Disclosed are computer implemented methods for testing astigmatism which display differently colored bars against a contrasting background. In one implementation, parallel colored bars are separated and joined through various angles of rotation against a constant background. In another implementation one set of bars is formed by variable grating pattern which is rotated within an annulus of solid color bars, desirably against a contrasting intermediate background and a reference background having a linear grating pattern.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: July 18, 2017
    Assignee: AIVISON PTY LTD
    Inventors: Desmond John Maddalena, Simon Grbevski