Optic nerve sheath diameter in normal-tension glaucoma patients

Gregor Peter Jaggi, Neil Richard Miller, Josef Flammer, Robert N. Weinreb, Luca Remonda, Hanspeter Esriel Killer

Research output: Contribution to journalArticle

Abstract

Background: To report on the optic nerve sheath diameter (ONSD) in patients with normal-tension glaucoma (NTG) compared with controls without known optic nerve (ON) or intracranial disease. Methods: In 18 patients with NTG (mean age 64.968.9 years; 7 women and 11 men), CT of the orbit was performed. 17 age- and gender-matched patients without ON or intracranial disease, who underwent CT of the orbits for non-ophthalmological reasons, served as controls. The widest intraorbital ONSD in axial sections was measured using a standardised technique. Study design: unmasked. Statistical analysis was performed using an independent two-tailed t Test and the non-parametric Spearman correlation test. Results: ONSD was significantly (p<0.001) increased in NTG patients (right side: mean 7.9±0.9 mm SD; left: 8.0±1.1 mm) compared with controls (right: 6.3±0.5 mm; left: 6.1±0.6 mm). Neither the NTG nor the control group had a significant difference in ONSD between males and females or between right and left sides. Conclusions: An increased ONSD is generally associated with increased intracranial pressure; however, ONSDs in a group of NTG patients also were significantly increased compared with controls. ON sheath compartmentation and thinning of the ON sheath are two possible explanations for an increase in the ONSD in patients with NTG.

Original languageEnglish (US)
Pages (from-to)53-56
Number of pages4
JournalBritish Journal of Ophthalmology
Volume96
Issue number1
DOIs
StatePublished - Jan 1 2012

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience

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