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. 2018 Aug 20;159(11):2375–2382. doi: 10.1097/j.pain.0000000000001343

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Copyright © 2018 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the International Association for the Study of Pain.

This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License 4.0 (CCBY-NC-ND), where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal.

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Figure 1. — Light discomfort threshold and pattern glare score illustrate visual allodynia in episodic migraine. (A) Light discomfort threshold is decreased in patients with episodic migraine (n = 39, mean ± SD: 2.64 ± 0.5 loglux) compared with healthy controls (n = 20; 2.98 ± 0.5, P = 0.02). (B) Pattern glare score is enhanced in patients with episodic migraine (n = 94; 3.2 ± 2.3) when compared with controls (n = 46; 4.9 ± 2.0, P < 0.001).