Approximately 20% of the population experience discomfort when looking at certain patterns- including rows of text. In the most severe cases, symptoms can include headaches, migraines or even seizures. More commonly, the text can appear to move wobble or flicker making it difficult to read fluently. This is known as Visual Stress.
Visual Stress is thought to be caused by overactivity of certain groups of cells in the visual areas of the brain. The good news is that the symptoms can often be reduced by using a coloured overlay, coloured lenses or by changing the background colour of the screen or tablet that you are looking at.
If you want to know more, please see the video below,
The ReadEZ system was developed at City University London by a team led by optometrist and visual scientist, Professor David Thomson. The system is used by over 400 Opticians and in many hospitals and schools and our coloured overlays, coloured lenses and screen tinting software are now used by 1000s of people around the world.