This video demonstrates the use of crescentic tuck in lamellar keratoplasty, which combines crescent lamellar dissection with a peripheral tuck, to treat a 58-year-old male with advanced pellucid marginal corneal degeneration. He had a preoperative astigmatism of 14.7 D and pachymetry at the inferior thinnest point was 280 µm. Twelve weeks postop, uncorrected and best-corrected visual acuities were 20/120 and 20/30, respectively, and astigmatism was reduced to 4 D.