Table 1

Diagnostic criteria used for classifying the most prevalent eye diseasesn

Definitions of eye diseases
Eye conditionClassificationDescription
POAGDefinite
  1. Open anterior chamber angle

  2. Localised absence of neuroretinal rim, cup:disc ratio≥0.7, or interocular asymmetry in vertical cup:disc ratio≥0.2 in similar-sized discs

  3. Presence of a concordant glaucomatous field defect based on criteria amended from Hodapp etal15

SuspectFeatures of glaucomatous optic neuropathy but with normal or equivocal fields or subjects with glaucomatous visual field defects but without concordant disc damage
Diabetic retinopathy*Background retinopathy (R1)Microaneurysms, dot and blot haemorrhages, venous loops and cotton wool spots
Preproliferative retinopathy (R2)Venous beading, venous reduplication, multiple blot haemorrhages, intraretinal microvascular abnormality
Proliferative retinopathy (R3)Active proliferative retinopathy
Maculopathy (M1)Groups of exudates, clinically significant macular oedema
AMDEarly AMD (AREDS category 2)34Several small drusen or a few medium-sized drusen in one or both eyes
Intermediate AMD (AREDS category 3)34Many medium-sized drusen or one or more large drusen (≥125 µm) in one or both eyes
Advanced AMD
(AREDS category 4)34
Geographical atrophy of the RPE involving the foveal centre or any features of neovascular AMD
Clinically significant cataractLOCS II grading35LOCS II score of ≥2 for cortex, posterior subcapsular, nuclear or hypermature cataract