To the Editor Siedlecki et al1 compared dark (DC) and milk chocolate (MC) consumption on optical coherence tomography angiography (OCT-A), visual acuity (VA), and large-letter contrast sensitivity.1 Their study was based on Rabin et al,2 comparing DC with MC on VA, large-letter CS, and small-letter CS (SLCS). While both studies reported minimal VA and large-letter CS effects, Rabin et al2 reported improved SLCS possibly because of flavanol-associated increased blood flow, suggesting that SLCS can identify visual acuity changes despite normal VA.3 The well-executed Siedlecki et al1 study included double masking, baseline measures, and OCT-A. However, we raise questions and offer comments.
Identify all potential conflicts of interest that might be relevant to your comment.
Conflicts of interest comprise financial interests, activities, and relationships within the past 3 years including but not limited to employment, affiliation, grants or funding, consultancies, honoraria or payment, speaker's bureaus, stock ownership or options, expert testimony, royalties, donation of medical equipment, or patents planned, pending, or issued.
Err on the side of full disclosure.
If you have no conflicts of interest, check "No potential conflicts of interest" in the box below. The information will be posted with your response.
Not all submitted comments are published. Please see our commenting policy for details.
Rabin JC, Carvalho P, Franklin CE. Questions on a Study on the Effects of Flavanol-Rich Dark Chocolate on Visual Function and Retinal Perfusion. JAMA Ophthalmol. Published online May 14, 2020. doi:10.1001/jamaophthalmol.2020.1487
Customize your JAMA Network experience by selecting one or more topics from the list below.
Create a personal account or sign in to: