Mandatory visual function measurements
| Visual acuity | Test each eye separately for the best corrected (with glasses) distance visual acuity, using either Snellen's or logMar chart. |
| Use a pinhole to record improvement after correcting for refractive error | |
| Colour vision | Test each eye individually with pseudoisochromatic plates, such as Ishihara's plates |
| Pupil examination | To exclude a relative afferent pupillary defect and oculosympathetic palsy (Horner's syndrome) |
| Visual field assessment | Assess visual fields (either a Humphrey's or Goldmann's), as confrontational visual fields picks up only gross defects |
| Dilated fundus examination | Document optic nerve head AND macular findings. This is important to exclude intraocular inflammation causing bilateral disc oedema. Ideally assess using a slit lamp. |