July 2018
Volume 59, Issue 9
Open Access
ARVO Annual Meeting Abstract  |   July 2018
Influence of two alcohol intake on night vision
Author Affiliations & Notes
  • Jose J Castro
    Optics, University of Granada, Granada, Granada, Spain
  • Miriam Casares-Lopez
    Optics, University of Granada, Granada, Granada, Spain
  • Francesco Martino
    Optics, University of Granada, Granada, Granada, Spain
  • Sonia Ortiz-Peregrina
    Optics, University of Granada, Granada, Granada, Spain
  • Enrique Hita
    Optics, University of Granada, Granada, Granada, Spain
  • José R Jiménez
    Optics, University of Granada, Granada, Granada, Spain
  • Footnotes
    Commercial Relationships   Jose Castro, None; Miriam Casares-Lopez, None; Francesco Martino, None; Sonia Ortiz-Peregrina, None; Enrique Hita, None; José Jiménez, None
  • Footnotes
    Support  This work was supported by Ministry of Economy and Competitiveness (Spain) and European Regional Development Fund (ERDF) (Grant FIS2013-42204-R), and by Ministry of Education, Culture and Sport (Spain) (Grant FPU15/05571).
Investigative Ophthalmology & Visual Science July 2018, Vol.59, 5188. doi:
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      Jose J Castro, Miriam Casares-Lopez, Francesco Martino, Sonia Ortiz-Peregrina, Enrique Hita, José R Jiménez; Influence of two alcohol intake on night vision. Invest. Ophthalmol. Vis. Sci. 2018;59(9):5188.

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      © ARVO (1962-2015); The Authors (2016-present)

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Purpose : To evaluate how the consumption of alcohol at different two rates can affect night vision.

Methods : A total of 17 individuals from different ages (30.2±9.5 years) took part in the study. All of them should have a best corrected visual acuity (BCVA) of 1.0 or higher. Three sessions were undergone: the first, under normal conditions, the second (Post 1) with the consumption of 300 ml of red wine (13.5% of alcohol), and the last (Post 2), with the consumption of 450ml of the same wine. We measured the breath-alcohol content (BrAC) and then the sample was divided in two groups: subjects with a BrAC of 0.25 mg/l or lower, and subjects with a BrAC>0.25 mg/l, since 0.25 mg/l is the legal limit for driving in Spain. In these sessions, under low-illumination conditions, we measured the visual-disturbance index (VDI) with the halometer HALO v1.0, the pupil size, and the intraocular straylight using the C-Quant device. The subjects also answered a questionnaire about their night-vision satisfaction.

Results : For the Post 1 condition, none of the subjects reached 0.25 mg/l, and we found a significant increase of the VDI (p<0.05) compared with normal conditions and an increase of pupil size and straylight, but not significant (p>0.05). In Post 2 conditions, for a BrAC<0.25 mg/l (n=10) we found a significant increase in the VDI in monocular conditions (p<0.05) but not significant under binocular conditions (p>0.05) and similar results for pupil size and straylight (p>0.05). For the group with a BrAC>0.25 mg/l (n=7), we found a significant increase of the VDI and pupil size (p<0.05). The intraocular straylight was also higher, but not significant (p>0.05). Questionnaire results showed a negative correlation with the straylight and VDI results (r<0), signifying that individuals who performed better the visual tasks scored lower on the questionnaire in such a way that they were more demanding with their vision.

Conclusions : There is a deterioration of night-vision performance after alcohol consumption, especially for BrAC values higher than 0.25 mg/l due to an increase of pupil size, among other factors. As a result, in subjects after drinking a stronger effect of visual halos and intraocular straylight has been demonstrated. Furthermore, as individuals with worse night vision are more satisfied with their vision, the use of questionnaires is not a reliable method to characterize night-vision.

This is an abstract that was submitted for the 2018 ARVO Annual Meeting, held in Honolulu, Hawaii, April 29 - May 3, 2018.


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