Khái niệm chung
Redness of the eye is common. It can occur in one or both eyes. It happens when the small blood vessels in the eye become larger. This can happen for many reasons. Usually, it is because something is in the eye. It can also happen because of a virus, trauma to the eye, or something more serious. Sometimes, red eye can put a person's vision at risk. You should see your GP as soon as you can if you have red eye. Your GP will help to work out the cause. They will let you know the best treatment for your red eye.