What is Visual Stress/Dyslexia?
Visual stress refers to discomfort and print distortion brought about by pattern glare: certain repeating shapes, high contrasts and brightness. The most common form of this pattern glare is found when an individual is reading black text on a white background.
Pattern glare occurs in patterns that are unnatural, meaning our eyes and brain have to work harder than normal to interpret the image/text. A reason this occurs is due to over-excitement in the visual cortex. This over-activity can cause visual symptoms (e.g. the blurring of letters and skipping of lines), and physical symptoms (e.g. headaches and eye tiredness) which will decrease individuals reading speed and comprehension. For many people this can be after 10-15 minutes, however for some individuals it can be immediately.
Who does it Affect?
It can affect individuals of any age or gender with approximately 20% of the population suffering to varying degrees and 5% being severely affected, meaning that their reading speed can be increased by at least 25%