This allows the light signal to be converted into electrical impulses, and these are transmitted to the brain for processing via nerve fibres. At first, this would happen two or three times a week, but it soon progressed to being […]
This allows the light signal to be converted into electrical impulses, and these are transmitted to the brain for processing via nerve fibres. At first, this would happen two or three times a week, but it soon progressed to being […]