Hess Chart: Postgraduate Students' Perspective
In Hess charting, one eye will see the red object on the screen and the other eye has to superimpose the green target ( maybe green torch) on the red target. This is called Haploscopic Principle. The dissociation of two eyes is achieved by the means of colors. In diplopia charting there is one object, the patient sees two images. We dissociate the eyes by means of complementary colors. Diplopia chart red glass always in front of the right eye. In the Hess chart, red if Infront of the right eye means, we are checking the position left eye ( behind the green glass ). If red is in Infront of the left eye means, the right eye position is checked (behind the green.) Always remember the eye behind the green glass is checked, about its positions, when the eye behind the red glass is fixing the red light of the screen The degree between two lines in the Hess chart is five ( 5 degrees ). Every 15 degrees, red lights are present: The inner nine lights represent the inner squares. Outer lights re

