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Comment & Response
September 26, 2019

Limits of Milk and Dark Chocolate Bars’ Effects on Human Visual Acuity and Contrast Sensitivity

Author Affiliations
  • 1Department of Radiotherapy, School of Medicine, The First Affiliated Hospital, Zhejiang University, Hangzhou, China
  • 2Bothwin Clinical Study Consultant, Redmond, Washington
  • 3Department of Biostatistics, School of Public Health, Fudan University, Shanghai, China
JAMA Ophthalmol. 2019;137(12):1463-1464. doi:10.1001/jamaophthalmol.2019.3789

To the Editor With great interest, we read the article published in the April issue of JAMA Ophthalmology entitled “Effects of Milk vs Dark Chocolate Consumption on Visual Acuity and Contrast Sensitivity Within 2 Hours: a Randomized Clinical Trial,” by Rabin et al.1 This article concluded that “contrast sensitivity and visual acuity were significantly higher 2 hours after consumption of a dark chocolate bar compared with a milk chocolate bar, but the duration of these effects and their influence in real-world performance await further testing.”1(p678) We have several comments on this study.

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