My friend, a doctor, who told me that there is no any official authority studies showed that hormone have effects on eyes. However, it really has a deep affect on people's body.. Hormones can affect people's body indeed. The most excellent affect on the body is sexual arousal. Mood swings and preparation of the body for mating, fighting, fleeing, and other activity are all related to hormones. In medicine, red eye is a non-specific term to describe an eye that appears red due to illness, injury, or some other condition, conjunctivitis (pink eye), frequent use of eye drops and dry eye. By the way, hormone can cause dry eye indeed, while dry eye may stimulate red eye. So it is possible that hormone can cause red eye.