hi, my 7 year old son has an asthma history but now he never been attacked by that, but now in the white part of his eyes has a yellowish nor red, i was able to consult an opthalmologist and the doc said that my son has a limbusitis a some kind of infection in the eye, she gives an eyedrops (ketotifen fumurate) for 2 weeks, but after 2 weeks the eye of my son looks like the same, its yellow and sometimes becomes red...