macular degeneration
noun [ U ] medical specialized uk/ˌmæk.jə.lə dɪ.dʒen.əˈreɪ.ʃən/ us/ˈmæk.jə.lɚ dɪˌdʒen.əˈreɪ.ʃən/
黄斑变性
a condition in which the macula (= the central area of the retina in the eye) changes, resulting in a loss of central vision. It usually affects old people