Common side effects These may affect up to nine people in every 100 people Affecting the eye • An allergic reaction in the eye • Tired eyes • Sensitivity to light • Darker skin colour around the eye • Darker eyelashes • Pain • A feeling that something is in your eye • Sticky eyes • Darker iris colour • Difficulty in seeing clearly • Irritation • Burning • Inflamed, red and itchy eyelids • Tears • Dryness • Swelling of the see-through layer which covers the surface of the eye • Cataract • Small breaks in the surface of the eye, with or without inflammation