E-ISSN: 1305-9327 ISSN: 1305-9319
Optic nerve head evaluation with heidelberg retinal tomography and optical coherence tomography in cases with physiologic large cups: a comperative study
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Researches
VOLUME: 8 ISSUE: 4
P: 170-177
December 2012

Optic nerve head evaluation with heidelberg retinal tomography and optical coherence tomography in cases with physiologic large cups: a comperative study

Med J Bakirkoy 2012;8(4):170-177
DOI: 10.5350/BTDMJB201208404
Şenay Aşık Nacaroğlu 1
Tamer Takmaz 2
Yelda Yıldız Taşçı 3
Canan Gürdal 2
İzzet Can 4
1. Tepecik Eğitim ve Araştırma Hastanesi, Göz Kliniği, İzmir
2. Atatürk Eğitim ve Araştırma Hastanesi, 2. Göz Kliniği, Ankara
3. Akdağmadeni Devlet Hastanesi, Göz Hastalıkları Servisi, Yozgat
4. Bozok Üniversitesi Tıp Fakültesi, Göz Hastalıkları AD, Yozgat
No information available.
No information available
Received Date: 14.08.2012
Accepted Date: 26.09.2012
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ABSTRACT

Objective:

In this study we evaluated the optic nerve head (ONH) cupping parameters and thickness of retinal nerve fibre layers (RNFL) with Heidelberg retinal tomography (HRT) and optical coherence tomography (OCT) in patients with the diagnosis of physiological cupping whose intraocular pressure (IOP) and visual fields (VF) are normal but ONH cupping is more than 0.6. We then compared them with early glaucomatous (EG) patients and normal cases as control (NK).

Material and Methods:

The study enclosed 57 eyes of 57 patients having no previous diagnosis of glaucoma but with physiological cupping C/D≥0.6 on routine ophthalomological evaluation and 56 eyes of 56 early glaucomatous patients followed in our glaucoma unit. Control group (NK) consisted of 55 eyes of 55 cases with C/D≤0.4. All the patients were evaluated with whole ophthalmologic examination, intraocular pressure measurements, with gonioscopy and tests for thickness of central cornea (TCC), OCT, RNFL analyses, HRT, ONH parameters and VF tests. Only one eyes of each patient were randomly chosen.

Results:

All of the three groups were comparable with regards to TCC and refraction values (p=0.437 and p=0.478). But there was significant differences regarding OCT and HRT evaluations (p<0.001). Disc areas of PC cases were greater than those of other groups (p<0.001). The cupping area of PC cases was similar to those of EG cases (p=0.085) whereas it was significantly greater than those in control group (p<0.001). There was no difference in Rim area of PC and C groups as was expected (p=0.355) and Rim area of both groups was measured thicker than that of EG cases (p=0.002). It was seen that the most important OCT parameter differentiating PC and EG cases from each other was mean RNFL thickness. When the sensitivity and specificity of OCT and HRT measurements in differentiating PC cases were compared it was seen that OCT was superior.

Conclusion:

Optic coherence tomography and Heidelberg retinal tomography might be valuable in differentiating between large optic nerve head cupping cases from glaucoma.

Keywords:
Physiologic cupping, OCT, HRT, RNFL