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Contrast sensitivity improves after brimonidine therapy in primary open angle glaucoma: a case for neuroprotection.

AbstractAIMS:
To determine the visual outcome following initiation of brimonidine therapy in glaucoma.
METHODS:
16 newly diagnosed previously untreated glaucoma patients were randomly assigned to either timolol 0.5% or brimonidine 0.2%. Visual acuity, contrast sensitivity (CS), visual fields, intraocular pressure (IOP), blood pressure, and heart rate were evaluated at baseline and after 3 months.
RESULTS:
IOP reduction was similar for both groups (p<0.05). Brimonidine improved CS; in the right eye at 6 and 12 cpd (p=0.043, p=0.017); in the left eye at 3 and 12 cpd (p=0.044, p=0.046). Timolol reduced CS at 18 cpd in the right eye (p=0.041). There was no change in any other measured parameters.
CONCLUSION:
Glaucoma patients exhibit improved CS on initiation of brimonidine therapy.
AuthorsD W Evans, S L Hosking, D Gherghel, J D Bartlett
JournalThe British journal of ophthalmology (Br J Ophthalmol) Vol. 87 Issue 12 Pg. 1463-5 (Dec 2003) ISSN: 0007-1161 [Print] England
PMID14660453 (Publication Type: Clinical Trial, Comparative Study, Journal Article, Randomized Controlled Trial)
Chemical References
  • Adrenergic alpha-Agonists
  • Adrenergic beta-Antagonists
  • Quinoxalines
  • Receptors, Adrenergic, alpha-2
  • Brimonidine Tartrate
  • Timolol
Topics
  • Adrenergic alpha-Agonists (therapeutic use)
  • Adrenergic beta-Antagonists (therapeutic use)
  • Analysis of Variance
  • Brimonidine Tartrate
  • Contrast Sensitivity
  • Glaucoma, Open-Angle (drug therapy, physiopathology)
  • Humans
  • Intraocular Pressure (drug effects)
  • Middle Aged
  • Quinoxalines (therapeutic use)
  • Receptors, Adrenergic, alpha-2 (drug effects)
  • Timolol (therapeutic use)

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