Practice / Describe the disc
Say what you see, in order
A disc description has a fixed order: margins, colour, cup to disc ratio, swelling, haemorrhage, the vessels. Choose each and read the sentence you have built; commit, and every feature is checked against the authored description of that photograph.

Mikael Häggström, CC0, source.
Describe the disc
Margins
Colour
Cup to disc ratio
Swelling
Haemorrhage
Vessels at the disc
Choose each feature to build the description.