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[Neuroretinal rim width in normal, hypertensive and glaucomatous subjects]
J M Larrosa1, V Polo, I Pinilla
1Servicio de Oftalmología, Hospital Universitario Miguel Servet, Zaragoza, España. jlarrosa@encomix.es
Purpose:
To determine width and shape of neuro-retinal rim in normal hypertensive subjects and patients with glaucomatous damage.
Material And Method:
Patients underwent a perimetry and a photographic retinal nerve fiber evaluation. Patients were divided in three groups: normal subjects (n=34), ocular hypertension subjects (n=38) and glaucoma patients (n=34). Neuro-retinal rim was measured using 40 degrees stereoscopic photographs with center in the optic nerve head based on a biomorphometry technique.
Results:
In normal subjects neuro-retinal rim appeared wider in the lower pole, followed by the upper, nasal and temporal aspects. Optic nerve fiber layer showed a decreased thickness in hypertensive and glaucoma patients, particularly in sectors of the temporal aspect of the optic nerve (p<0.05).
Conclusions:
A Planimetry study of the optic nerve is able to detect alterations in normal neuro-retinal rim configuration and can as well detect thinning of the rim, particularly in temporal, upper and lower areas.