About 1 in 10 people have a visual processing difficulty. This may involve distortion of letters or words, letters appearing to move around on the page, or flashing lights.
The glare from white paper, fluorescent lighting or computer screens can cause problems.
These problems make it almost impossible to read – and it is not picked up in standard eye tests! The problem is not the same as dyslexia – but some people have both problems.
Luckily, in most cases, it can be resolved by the use of tinted reading rulers or overlays. In more serious cases, an optometrist should be consulted. More information is available from the British Association of Behavioural Optometrists.
For computer screens, try a virtual ruler, for example: http://a-ruler-for-windows.software.informer.com/
Sheila Brooks can conduct a Visual Stress Check and supply equipment in the appropriate colour for the individual.