WHAT IS VISUAL STRESS?
Visual Stress is a visual processing disorder due to sensitivity to light and a believed hyper- excitability of visual brain. Visual Stress is said to affect 20% of the population – 13 million people in UK. It is not the same as dyslexia but it affects about 40% of dyslexics.
As humans we are adapted to view natural images. Imagine a picture of a lake and mountains, beach, garden – is that comfortable to look at? Now imagine a stripy black and white shirt or a zebra – is that comfortable?
English text is made of striped patterns which are mainly written in black on white paper, to our brain look like stripes – not natural!
WHAT ARE THE SYMPTOMS OF VISUAL STRESS?
Print blurs or goes out of focus
Letters move, shimmer or shake
Patterns like ‘rivers’ or ‘worms’ appearing when reading black on white text
Glare from page or VDU
Coloured halos around words
Poor tracking, losing place when reading.
Sore , watery eyes and headaches when reading
HOW CAN WE HELP?
Filters can reduce discomfort by reducing contrast and filtering out a particular wavelength of light that causes the neurons to fire unnecessarily. But it has to be correct colour, saturation and brightness. A person may be sensitive to a particular wavelength of light and this can explain why a coloured tint can stabilize the visual brain.
BINOCULAR VISION & READING
Lot of symptoms of visual stress are the same as if the eyes have binocular vision insufficiency so do not work together properly. This could be due to eye muscles weakness so it’s VERY important to have full eye test and detailed binocular vision assessment. Unstable binocular vision can cause fixation to swap between eyes. This can be addressed with prescription lenses that stabilize the vision at near. Then we can proceed to Colorimetry assessment which goes through 6000 colour combinations to find the correct tint.
WHAT OUR PATIENTS SAY..
"Can't recommend Taylor Biddle enough. Taras puts my daughter at ease during her visual stress tests. Staff are very welcoming and professional. Nothing is too much trouble."
- J. Prosser -
02/2022 via Google