Wesson Fixation Disparity Card with polaroid glasses
 Catalogue Number: 4147 Wesson Fixation Disparity Card with polaroid glasses Category: Equipment Sub-Category: Tests of binocular vision Designer/inventor: Wesson, Michael D. Edition: 1st Time Period: 1940 to 1999 Description Of Item: Laminated white card used to evaluate a number of important parameters of fixation disparity (or retinal slip) by associated phoria method. Colour-coded scale on card measures fixation disparity. The small central target is polarised and is viewed through polarised filters with the right eye seeing a vertical arrow and the left eye seeing a coloured-coded scale. Print around the central targets provides an accommodation and fusion lock. Can be used to measure fixation disparity curves. 153 x 102 mm.WESSON FIXATION DISPARITY CARD with copyright symbol on lower right hand corner. How Acquired: Donated by Margaret Banks Date Acquired: 28/10/2019 Condition: Very good Location: Archive room. West wall. Unit 5 Overhead display |