title: Large optic disks in the Marshallese population.
abstract: On routine examination, asymptomatic patients from the Marshall Islands were noted to have large optic disks associated with high cup/disk ratios and normal intraocular pressure. We retrospectively analyzed color fundus photographs of 54 eyes and 22 eyes of 15 patients had optic disks greater than 2.10 mm, or megalopapilla. Of 36 patients with cup/disk ratios exceeding 0.6, 31 (86%) had visual acuities of better than or equal to 20/30. The optic nerve rim and disk areas varied directly as did disk and cup diameters. Three large disks with an 18-year photographic follow-up showed no change. Optic disk characteristics can vary widely among genetically isolated populations.
authors.affiliation: Department of Ophthalmology, School of Medicine, State University of New York, Stony Brook.
authors.forename: J M
authors.initials: JM
authors.lastname: Maisel
authors.forename: C S
authors.initials: CS
authors.lastname: Pearlstein
authors.forename: W H
authors.initials: WH
authors.lastname: Adams
authors.forename: P M
authors.initials: PM
authors.lastname: Heotis
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D005654:Fundus Oculi; D005901:Glaucoma / Q000473:pathology; D006801:Humans; D008297:Male; D008849:Micronesia; D008875:Middle Aged; D009898:Optic Disk / Q000033:anatomy & histology* / Q000528:radiation effects; D010781:Photography; D012016:Reference Values; D012189:Retrospective Studies; D014792:Visual Acuity