Introduction. An altered perfusion of the optic nerve head has been proposed
as a pathogenic factor in glaucoma. Objective. The aim of this study was to
evaluate the correlation between ocular pulse amplitude (OPA), measured by
Dynamic contour tonometer (DCT) and colour Doppler imaging (CDI) of the
arteric retro- bulbar vessels. Methods. Twenty patients older than 50 years
were examined, and divided into two equal groups. The first group comprised
of patients with normal tension glaucoma treated with topical
antiglaucomatous therapy, and the second group included patients with ocular
hypertension and glaucoma suspicious without any antiglaucomatous therapy.
Ocular pulse amplitude (OPA) was measured with DCT. CDI was also performed.
We measured haemodynamic parameters of the internal carotid artery (ICA),
ophthalmic artery (OA), central retinal artery (CRA), and posterior
ciliary arteries (PCA). Peak systolic (PSV), end- diastolic (EDV) velocities
were measured, and resistance index (RI) and pulsatility index (PI) were
calculated. Results Correlation with OPA showed indirect servitude in the RI
of the ICA, RI and PI of the CRA, in the first group; and in the PSV and EDV
of the ICA, in the RI and PI of the OA, EDV and RI of the CRA, and RI of the
PCA, in the second group Conclusion. Increase of OPA was mostly followed by
the increase of the parameters (PSV, EDV, RI, and PI) of the arteric
retrobulbar vessels in the first group; in the second group, increase of OPA
was in almost 50% of parameters followed by their decrease.
Correlation between ocular pulse amplitude measured by dynamic contour tonometer and colour doppler flow imaging of the arteric retrobulbar vessels
