An itchy eye is a common symptom that many patients complain about to their optometrist. An itching sensation is usually related to allergies. Typically, a particle/allergen makes contact and attaches to one of superficial layers of the eye. The allergen will cause the tissue to release certain chemicals in the eye called histamines, thus causing the eyes to become itchy and red. It can also cause bumps to appear underneath the eyelid, which will create an uneven ocular surface leading to irritation every time a patient blinks. Most of the time itchy eyes point towards allergies but in some cases it can relate to other eye issues. If your itchy eyes are worsening and vision begins to be compromised then please see an optometrist to be properly diagnosed.