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https://protectingsight.com/2021/02/16/protecting-sight-248-the-search-for-the-true-face-of-leonardo-flip-chop-high-myopia-ptosis-myasthenia-and-cogans-lid-twitch/
Protecting Sight #248: The search for the true face of Leonardo. Flip & chop, high myopia, ptosis, myasthenia, and Cogan's lid twitch