THE University of NSW is looking for child volunteers for a study into how the brain processes black and white patterns and colour.
It is open to children aged 4 to 12 in St George who have amblyopia (lazy eye) or normal vision (reading glasses permitted).
The study will examine why treatment for amblyopia is less effective in some people.
Chief investigator, Mei Ying Boon, said amblyopia made it difficult for children to read, play sports and see depth or 3D.
Dr Boon said about 20 children with ambly-opia and eight with normal vision had taken part so far. About 125 children are needed.
She said children with normal vision were needed as a comparison.
Participation involves a brief eye examination and measurement of the child's brainwaves, using stick-on electrodes, at either Hurstville or at the university campus at Kensington.
It involves two or three 40-minute sessions. Participants will be paid. Details: Dr Boon, 9385 4621 or