What Are Red Eyes & What Causes?
What Are Red Eyes? When the small blood vessels on the surface of your eyes' whites enlarge, the whites of one or both eyes turn pink or crimson in color. What causes redness in the eyes? Dilation of small blood vessels between the sclera and the underlying transparent conjunctiva of the eye causes the appearance of red eyes. Environmental or lifestyle factors, as well as specific eye disorders, can cause these small blood vessels (many of which are ordinarily undetected) to swell. Allergies, eye fatigue, excessive contact lens wear, or common eye infections like pink eye are the most prevalent causes of red eyes (conjunctivitis). Redness in the eye, on the other hand, can sometimes indicate a more serious eye problem or illness, such as uveitis or glaucoma. Factors can contribute to red, bloodshot eyes Allergens in the air (causing eye allergies) Pollution of the air a cloud of smoke (fire-related, second-hand cigarette smoke, etc.) The air is dry (arid climates, airplane cabi...