The eye infection disease is more common in summer in countries like Pakistan in the months of April, May, June, and July. In these months the temperature often reaches above 40 degree Celsius. Young birds are more affected by this disease and especially when you purchase some new birds and bring them home in these hot summer days. Without proper treatment, your birds will eventually die.
Different people give different reasons for the cause of this problem. Some will say that the birds of Karachi bought into Punjab carries the virus with them. Others will say that due to climate difference between Karachi and Lahore causes the birds to develop this eye infection. Some people argue that mosquito bites is the cause of this disease. The more people you meet the more opinions you will get.