http://medicalxpress.com/ en-us Medical Xpress internet news portal provides the latest news on Health and Medicine. Identifying lines on a colour-coded metro map is tricky for those who can't see some colours. Choosing clothes or telling a green from a red apple can be just as baffling. http://medicalxpress.com/news/2012-03-portuguese-hero-colourblind.html Ophthalmology Wed, 21 Mar 2012 05:13:54 EST news251525540