1. A correlation of fields and discs in open angle glaucoma;Douglas;Can J Ophthalmol,1974
2. Standardizing diagnostic procedures;Kahn;Am J Ophthalmol,1975
3. Variability of expert observers in evaluating the optic disc;Lichter;Trans Am Ophthalmol Soc,1976
4. Optic disc parameters and onset of glaucomatous field loss;Sommer;I. Methods and progressive changes in disc morphology. Arch Ophthalmol,1979
5. A comparison of refraction results on the same individuals;Sloane;Am J Ophthalmol,1954