Dry Eye occurs when there is inadequate tear film to protect the ocular surface. Symptoms include scratchy, gritty irritated eyes. Life expectancy, longer working careers, increased screen time, low humidity, metropolitan environment and diet are increasing the incidence of dry eye. Diabetes, smoking, contact lenses, eye surgery and medications can exacerbate symptoms. Mild dry eye can be annoyingly uncomfortable, and severe symptoms can limit activities such as work, socialising or travel, significantly reducing quality of life.