Corneal arcus. Four representative slides of corneal arcus. Arcus deposits tend to start at 6 and 12 o'clock and fill in until becoming completely circumferential. There is a thin clear section separating the arcus from the limbus known as the lucid interval of Vogt. Zech and Hoeg Lipids in Health and Disease 2008 7:7   doi:10.1186/1476-511X-7-7
Loren A Zech Jr and Jeffery M Hoeg
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