Srpski arhiv za celokupno lekarstvo 2011 Volume 139, Issue 7-8, Pages: 428-432
https://doi.org/10.2298/SARH1108428S
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Differences of optic disc appearance between normal tension and high tension glaucoma patients
Stojčić Milan (Zavod za zdravstvenu zaštitu radnika „Železnice Srbije”, Beograd)
Hentova-Senćanić Paraskeva (Klinika za očne bolesti, Klinički centar Srbije, Beograd)
Stojčić Biljana (Dom zdravlja „Rakovica”, Beograd)
Introduction. The term glaucoma is used to cover a wide range of diseases,
whose main feature is optic neuropathy. According to the level of intraocular
pressure (IOP), the open angle glaucoma is arbitrarily divided into high
tension glaucoma (HTG) and normal tension glaucoma (NTG). Objective. The aim
of this study was to investigate the differences of optic disc cup appearance
between patients with NTG and HTG. Methods. Prospective study included 30
patients (60 eyes) with NTG and 30 patients (60 eyes) with HTG. IOP was
measured by Goldmann applanation tonometry. Examination of optic disc head
was performed by indirect ophthalmoscopy with Volk 90 D superfield lens
through a dilated pupil to observe qualitative and quantitative parameters.
Visual fields were examined in all patients with the Octopus program G1, full
threshold strategy (Octopus 500 EZ, Interzeag, Switzerland). Results.
Vertical form of optic disc cup was present in 11 eyes with NTG (18.3%) and
three eyes with HTG (5%) (p<0.05). A disc with localized tissue loss (polar
notching) on the inferior pole was observed in eight eyes with NTG (13.3%)
and in one eye with HTG (1.7%) (p<0.01). Uniformly enlarged, round cup was
more frequent in patients with HTG than NTG: 93.3% and 68.3% respectively
(p<0.05). Conclusion. The perceived differences indicate a complex
multifactorial nature of glaucoma disease and a possible existence of two
pathophysiological ways of optic disc changes within the same basic disease.
Keywords: optic disc cup, normal tension glaucoma, high tension glaucoma
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