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Effect of Alphagan on Retinal Blood Flow Autoregulation and Motion Detection in Patients With Normal Pressure Glaucoma

2014-08-27 03:14:33 | BioPortfolio

Summary

The investigators have completed a study in which the investigators examined the response of the retinal circulation to changes in posture from sitting to lying down in patients with Normal Tension Glaucoma (NTG). This alteration in position produces changes in the local blood pressure at the entrance to the retinal vasculature. In a healthy retina, the vasculature adapts by dilating and constricting in order to maintain a steady blood flow rate. In an eye with NTG, this often does not occur. Upon analysis at the completion of the study , the investigators found that the patients who had been taking Alphagan (brimonidine) during the study did not exhibit the blood flow increases typical of NTG while lying down; instead, they maintained a steady blood flow rate as did the group of healthy control subjects. The investigators primary objective is to now demonstrate in a prospective study that Alphagan can restore retinal vascular autoregulatory function in patients with NTG who do not autoregulate. The investigators will also determine the effect of Alphagan treatment on the patients' ability to detect motion.

Study Design

Control: Uncontrolled, Endpoint Classification: Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment

Conditions

Glaucoma

Intervention

Alphagan (brimonidine) 0.15%

Location

Massachusetts Eye and Ear Infirmary
Boston
Massachusetts
United States
02114

Status

Recruiting

Source

Massachusetts Eye and Ear Infirmary

Results (where available)

View Results

Links

Published on BioPortfolio: 2014-08-27T03:14:33-0400

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Medical and Biotech [MESH] Definitions

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A cloprostenol-derived amide that is used as an ANTIHYPERTENSIVE AGENT in the treatment of OPEN-ANGLE GLAUCOMA and OCULAR HYPERTENSION.

A localized defect in the visual field bordered by an area of normal vision. This occurs with a variety of EYE DISEASES (e.g., RETINAL DISEASES and GLAUCOMA); OPTIC NERVE DISEASES, and other conditions.

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