The condition and the treatment
Choroidal neovascularisation happens in people who have pathological myopia (a rare type of short-sightedness) when abnormal blood vessels grow under the retina (the light-sensitive area at the back of the inside of the eye). These vessels can break easily, leaking blood and fluid into the retina and causing sight problems such as distorted vision or being unable to see straight ahead.
Ranibizumab (also known as Lucentis) is given by injection into the eye after a local anaesthetic. It prevents abnormal blood vessels developing and either improves sight or stops it getting worse.