Test measurements assessed
| Research clinic reference standard | Hospital glaucoma clinic | Community based optometrists |
|---|---|---|
| Visual field analysis with Henson CFA3000 132 point threshold related suprathreshold examination | Visual field analysis with a Henson CFS2000/CFA3000 | Visual field analysis with Henson CFA3000 132 point threshold related suprathreshold examination |
| Repeat visual field examination | Repeat visual field examination (50% of patients) | |
| Triple IOP measurement by Goldmann applanation tonometry | Single IOP measurement by Goldmann applanation tonometry | Single IOP measurement by Goldmann applanation tonometry |
| Vertical cup to disc ratio assessment by binocular indirect ophthalmoscopy (dilated pupil) | Vertical cup to disc ratio assessment using direct ophthalmoscopy or binocular indirect ophthalmoscopy | Vertical cup to disc ratio assessment by binocular indirect ophthalmoscopy (dilated pupil) |
| Stereophotographic analysis of vertical cup to disc ratio by observer 1 | ||
| Stereophotographic analysis of vertical cup to disc ratio by observer 2 |