Redness in eyes persists even after physicians medicine,check with the eye specialist

In summers bit of redness in eyes is common place.On regular washing of eyes with fresh water,this redness subsides on its own.But if the same redness persists,say lasts longer than a week, then this must be immediately attended.Check with the physician and follow the advise attentively.But even after all these steps,you are not getting any relief,then you must check with an eye specialist.
There can be variety of reasons for redness but what affects an individual can only be said after thorough examination.