Keratoconus is a non-inflammatory eye condition. It occurs when the cornea, which is usually round and dome-shaped, becomes much thinner. This causes a cone-like bulge to develop and the patient begins to experience a range of symptoms, some of which affect their vision. Keratoconus is progressive. This means that it will continue to worsen until treatment is sought. As the cornea becomes increasingly more cone-like, it causes the patient to develop myopia, better known as near-sightedness. This is where the patient has the ability to see objects close to them clearly with ease, but those that are further away appear blurred. Other symptoms of keratoconus include astigmatism, swelling, and scarring of the cornea, and eye strain and headaches which develop as a result of trying to focus on the objects that you cannot see clearly. Keratoconus can develop in one eye, or in both at the same time.