Method and Apparatus for Measuring Vision Function

A system for presenting visual images to an optical system, the system comprising:

• a) a housing (200);
• b) the housing containing a pair of lens tubes (250);
• c) each lens tube in visual communication with a second lens, the second lens comprising a variable lens system to allow for refraction correction;
• the second lens disposed adjacent to the optical system;
• d) a first lens in visual communication with the second lens, the first lens comprising a front surface and the first lens comprising a back surface;
• and
• e) a front cover (260) configured to accommodate a screen (405) of an electronic device such that the screen of the electronic device is in the optical plane of the front surface of the first lens.

A method of presenting visual images to an optical system, the method comprising the steps of:

• a) using a housing (200);
• the housing containing a pair of lens tubes (25)
• b) disposing each lens tube to be in visual communication with a second lens (360);
• c) disposing a first lens (320) to be in visual communication with the second lens, the first lens comprising a front surface and the first lens comprising a back surface;
• d) disposing a front cover (260) configured to accommodate a screen (405) of an electronic device such that the screen of the electronic device is the optical plane of the front surface of the first lens;
• e) disposing the lenses of the first lens tube to produce a horizontal angular disparity in an image presented to the optical system as compared to the image presented by the lenses of the second lens tube.