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Morpho-functional follow-up of the optic nerve in treated ocular hypertension: disc morphometry and steady-state
Tommaso Salgarello1, Benedetto Falsini, Giovanna Stifano
1Institute of Ophthalmology, Catholic University of Sacred Heart, Rome, Italy. tommaso.salgarello@rm.unicatt.it
Purpose:
To examine longitudinally optic disc structure and inner retinal function in treated ocular hypertension (OHT).
Materials And Methods:
A morphometric (Heidelberg Retina Tomograph, HRT) and functional (steady-state pattern electroretinogram, PERG) evaluation of 27 OHT patients treated with topical beta-blockers and/or prostaglandin analogues and prospectively followed over a 24 +/- 6 month period.
Results:
Compared with baseline, mean final PERG amplitude tended to increase (p < 0.01), while HRT was stable. Individual PERG amplitude increase was large (>or= 100%) in some patients (5/27), and unexplained by clinical parameters at baseline.
Conclusions:
In treated OHT, functional responses may improve while disc structure remains stable. The findings suggest that OHT-associated inner retinal dysfunction is at least in part reversible with therapeutic intraocular pressure control.
