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Retrobulbar blood flow and visual field alterations after acute ethanol ingestion

Authors Weber A, Remky A, Bienert M, Huber-van der Velden K, Kirschkamp T, Rennings C, Roessler G, Plange N

Received 16 March 2013

Accepted for publication 16 April 2013

Published 19 August 2013 Volume 2013:7 Pages 1641—1646

DOI https://doi.org/10.2147/OPTH.S45304

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 2

Anke Weber, Andreas Remky, Marion Bienert, Klaudia Huber-van der Velden, Thomas Kirschkamp, Corinna Rennings, Gernot Roessler, Niklas Plange

Department of Ophthalmology, RWTH Aachen University, Aachen, Germany

Background: The purpose of this study was to test the effect of ethyl alcohol on the koniocellular and magnocellular pathway of visual function and to investigate the relationship between such visual field changes and retrobulbar blood flow in healthy subjects.
Methods: In 12 healthy subjects (mean age 32 ± 4 years), color Doppler imaging, short-wavelength automated perimetry, and frequency doubling perimetry was performed before and 60 minutes after oral intake of 80 mL of 40 vol% ethanol. Mean and pattern standard deviations for short-wavelength automated and frequency doubling perimetry were assessed. End diastolic velocity (EDV) and peak systolic velocity (PSV) were measured in the central retinal and ophthalmic arteries using color Doppler imaging. Systemic blood pressure, heart rate, intraocular pressure, and blood alcohol concentration were determined.
Results: Mean PSV and EDV in the central retinal artery showed a significant increase after alcohol intake (P = 0.03 and P = 0.02, respectively). Similarly, we found a significant acceleration of blood flow velocity in the ophthalmic artery (P = 0.02 for PSV; P = 0.04 for EDV). Mean intraocular pressure decreased by 1.0 mmHg after alcohol ingestion (P = 0.01). Retinal sensitivity in short-wavelength automated perimetry did not alter, whereas in frequency doubling perimetry, the mean deviation decreased significantly. Systolic and diastolic blood pressure did not change significantly. Mean blood alcohol concentration was 0.38 ± 0.16 g/L.
Conclusion: Although ethanol is known to cause peripheral vasodilation, our subjects had no significant drop in systemic blood pressure. However, a significant increase of blood flow velocity was seen in the retrobulbar vessels. Regarding visual function, moderate alcohol consumption led to reduced performance in the magnocellular visual system tested by frequency doubling perimetry, but had no effect on short-wavelength automated perimetry.

Keywords: visual field, retrobulbar blood flow, frequency doubling perimetry, short-wavelength automated perimetry


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