text: eye disease? there is always a spot of redness in my right eye and always on that eye only and not on my left eye. it always appears on that same spot too. whenever there is a red spot, i put eye drops on it and it goes away. after a few days, the red will come back again. am i allergic to something? or maybe it is something serious, like blindness? since this spot keeps coming back, i strongly encourage you to make an appointment with an optometrist or ophthalmologist.  it is likely something very treatable and unlikely that it will result in blindness if you seek proper care.