Stage 0
Normal disc + blurring of nasal and temporal disc; no obscuration of the vessel + cup is maintained
Stage 1
C shaped blurring of nasal, superior and inferior border
Temporal margin is normal (usually)
Stage 2
Elevation of temporal margin
Stage 3
Elevation of entire disc
Obscuration of retinal vessels at disc margin
Stage 4
Complete obliteration of the cup
Obscuration of retinal vessel on the surface of the disc
Stage 5
Dome shape appearance + all vessels being obscured
Acknowledgement to Dr Gee (Chief MMed Neurosurgery 09)
