When starting with Descemet’s membrane endothelial keratoplasty, it is common to manually mark a ring of purple dots on the corneal surface to serve as a centering guide for the graft’s final position.
Although technically easy to apply, this array of purple dots may entail two notable drawbacks. First, inking the corneal surface is a somewhat tedious process and, while not inordinately time-consuming, nevertheless represents some period of extra manipulation. Second and more significantly, these purple dots may obscure the surgeon’s view of the most important part of the
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