MSFinals-3839

A 60-year-old woman comes to the clinic complaining of seeing a curtain moving from the right inferonasal side towards the centre for the past 3 days. She reports seeing flashes of lights at the right inferonasal side and an increase in the number of floaters in her right eye. Her central vision is not affected, and her vision is 6/6 in both eyes. What is the probable diagnosis?