The most common Meares-Irlen syndrome (from Olive Meares and Helen irlen) symptoms
are the appearance of text moving or blurring (visual perception distortions), sore
eyes, tired eyes, visual discomfort and headaches.
The Meares-Irlen syndrome is present when a childs' reading ability is improved
by the use of coloured filters which need to be those with smooth transition curves
to minimise the effect of external lighting conditions.
People with Meares-Irlen syndrome symptoms still require a full eye examination
to rule out the possibility of other ocular causes.