Imaging was performed at baseline and at follow-up months @ , @ , @ , and @ , including autofluorescence ( AF ) imaging with a fundus camera-based flash system ( TRC-@DX ; Topcon Medical Systems , Oakland , NJ ; AF excitation : @-@ nm ; detection : @-@ nm ) , AF and fluorescein angiography ( FA ) imaging with a confocal scanning laser ophthalmoscopy ( SLO ) system ( Spectralis ; Heidelberg Engineering , Heidelberg , Germany ; AF excitation : @ nm ; detection : > @ nm ) , and SD-OCT en face imaging ( Cirrus ; Carl Zeiss Meditec , Dublin , CA ) .