The main method of diagnosing macular degeneration is a dilated fundus examination, in which the back of the eye (the fundus) is examined for the presence of drusen and certain pigmentation abnormalities. If macular degeneration is present, additional tests (e.g., optical coherence tomography, fluorescein angiography) are required to either diagnose or rule out wet/neovascular macular degeneration. Ophthalmological examinations are also used to assess visual function and eyesight changes.