In the late 1800s and early 1900s, some ophthalmologists considered very seriously different elements of visual function (control of the movement of the eyes) insofar as it contributes to significant dysfunction and interferes with reading. At times, the concepts of…
Category: background
public info re: background
Harmon Distance
Research on human ergonomics has determined that the optimal visual distance for reading and other close work is the Harmon Distance or “Elbow Distance”. This distance is measured by placing a closed fist under the chin and resting the elbow…
VSP: Visual Signal Processing
It is almost impossible to know exactly ‘how’ vision works in the brain. We can begin to break down actual brain functions by studying behaviour, but nowadays technology allows us to get closer still to what is really going on.…
Cook’s 7 Visual Abilities
THE 7 VISUAL ABILITIES Dr. David Cook is a leading speaker and clinician working with visual neurorehabilitation. In Dr. Cook’s clinic in Marietta, Georgia, he uses Optometric Vision Therapy to train seven different visual abilities, what I call ‘Cook’s 7…