THE IMPACT OF CENTRAL CORNEAL THICKNESS ON VALUES OF INTRAOCULAR PRESSURE MEASURED WITH TWO METHODS: GOLDMANN APPLANATION AND DYNAMIC CONTOUR TONOMETRY IN PATIENTS WITH OPEN-ANGLE GLAUCOMA

  • Elena Jordanova CHC Zemun
  • Paraskeva Hantova-Senćanić
  • Ivan Marjanovic Clinics of ophtalmology CCS
  • Ivan Sencanic Clinics of ophtalmology CHC Zvezdara
  • Ivana Stefanovic EMC Belgrade
  • Marko Baralic Clinics of nephrology CCS
DOI: https://doi.org/10.5937/halo56-25649
Keywords: central corneal thickness, Dynamic contour tonometry, ocular pulse amplitude

Abstract


Objective. of this study was to evaluate the impact of corneal central thickness (CCT) on values of IOP measured with two methods: Goldmann applanation tonometry (GAT) and DCT.

Methods. The study included 150 patients (300 yeas) with the open-angle glaucoma (54 males) mean age 59.39± 13.12 years. IOP was measured with two methods: GAT and DCT. CCT was measured (ultrasound pachymetry). DCT discovered one more value- ocular pulse amplitude (OPA).

Results. IOP measured with GAT was lower compared to IOP measured with DCT (17.71±3.35mmHg vs 19.80± 3.67mmHg). Significantly positive association between IOP measured with GAT and IOP measured with DCT was found (r= 0.867, p< 0.01). In all patients significantly positive corelation between CCT and IOP measured with GAT (r=0.198, p< 0.01) and significantly positive corelation between CCT and IOP measured with DCT was found (r=0.180, p< 0.05). When changing CCT for every 10μm a change of IOP measured with GAT was for 0.3mmHg while the average change of IOP measured with DCT was for 0.4 mmHg. There was found significantly positive correlation between CCT and OPA (r=0.204, p< 0.01). Also, significantly positive association between OPA and IOP measured with GAT (r= 0.393, p< 0.01) as well as significantly positive association between OPA and IOP measured with DCT (r= 0.452, p< 0.01)  was found.

Conclusion. IOP measured with GAT was lower than IOP measured with DCT. CCT has impact on both methods: GAT and DCT. The impact CCT on IOP (DCT) was lower compared to impact CCT on IOP(GAT). 

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Published
2020/04/07
Issue
Vol. 26 No. 1 (2020)
Section
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