Korean J Ophthalmol.  2005 Sep;19(3):189-194. 10.3341/kjo.2005.19.3.189.

Optic Nerve Head Topographic Measurements and Retinal Nerve Fiber Layer Thickness in Physiologic Large Cups

Affiliations
  • 1The Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea. kcyeye@yumc.yonsei. ac.kr

Abstract

PURPOSE
To evaluate the parameters of optic nerve head (ONH) and retinal nerve fiber layer (RNFL) in patients with large cup/disc ratio (CDR) and normal neuroretinal rim configuration who have normal perimetry (physiologic large cups, LC) and to compare these parameters with those of the normal and early glaucoma patients. METHODS: Using Heidelberg retinal tomography (HRT) and optical coherence tomography (OCT), 30 patients with LC, 29 normal subjects, and 31 early glaucoma patients were examined. One eye from each subject was randomly selected. RESULTS: Significant differences between LC and glaucomatous eyes (GE) were found in parameters indicating loss of nerve fibers, such as rim area, rim volume, and mean RNFL thickness. However, there was no difference between LC and normal eyes (NE) in RNFL thickness, rim area, and rim volume. LC was able to be defined as a normal central excavation with a large disc and large CDR with a normal rim area. CONCLUSIONS: HRT ONH parameters and RNFL thickness obtained with OCT may be useful for differentiating between glaucoma and LC eyes.

Keyword

HRT; OCT; Optic nerve head; Physiologic large cups; Retinal nerve fiber layer; Rim area; Rim volume

MeSH Terms

Retina/*pathology
Optic Disk/*pathology
Nerve Fibers/*pathology
Middle Aged
Humans
Glaucoma/*pathology
Adult
Adolescent

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