Reliable SAP visual field results (fixation loss \< 33%, false positive \< 15% and false negative \< 20%).

Visual acuity better or equal to 0.20 logMAR.

Spherical refractive error within -6.00 to +6.00D and cylindrical error \<2.00D

No ocular co-morbidity likely to affect the visual field or OCT results.

Age: 40-80 yrs

Optic disc showing glaucomatous changes.

SAP MD not worse than -6dB

Normal SAP visual field data (MD, PSD, GHT within normal range)

No evidence of glaucoma or other Ocular co-morbidity in the eye suitable for the study.

Diagnostic Performance of Smart Supra Perimetry (The DPSSP Study)