People wear contact lenses for various reasons

Contact lenses typically provide better vision than spectacles for some visual conditions such as severe short-sightedness [myopia], long-sightedness [hyperopia], astigmatism, corneal distortion, or after cataract removal [aphakia].

Some people like the wider field of view provided by contact lenses, as side vision [peripheral vision] is often blocked, obscured or limited by spectacle frames. Contact lenses do not fog up with changes in temperature – or from perspiration – and they are unaffected by rain.

Sports players and people involved in vigorous activities often find contact lenses more convenient than spectacles, especially for water sports and contact sports.