PT - JOURNAL ARTICLE AU - Paul J Foster AU - Ralf Buhrmann AU - Harry A Quigley AU - Gordon J Johnson TI - The definition and classification of glaucoma in prevalence surveys AID - 10.1136/bjo.86.2.238 DP - 2002 Feb 01 TA - British Journal of Ophthalmology PG - 238--242 VI - 86 IP - 2 4099 - http://bjo.bmj.com/content/86/2/238.short 4100 - http://bjo.bmj.com/content/86/2/238.full SO - Br J Ophthalmol2002 Feb 01; 86 AB - This review describes a scheme for diagnosis of glaucoma in population based prevalence surveys. Cases are diagnosed on the grounds of both structural and functional evidence of glaucomatous optic neuropathy. The scheme also makes provision for diagnosing glaucoma in eyes with severe visual loss where formal field testing is impractical, and for blind eyes in which the optic disc cannot be seen because of media opacities.