Clear crescent: Laser-assisted in situ keratomileusis flap displacement.

A 24-year-old female presented on the second postoperative day after laser-assisted in situ keratomileusis (LASIK) surgery. She gave a history of rubbing her right eye (RE) on the next day after surgery. The slit lamp evaluation revealed the presence of an inferior crescent in the RE (Fig. 1a- image captured on smartphone), and on further slit lamp examination the flap displacement [Fig. 1b] was noted superiorly. Anterior segment optical coherence tomography (OCT) [Fig. 1c] confirmed the above findings. Flap repositioning was done after refloating the flap. Traumatic flap displacement occurs in 1%–2% of cases more often within the first 24 hr but may also occur after 7 years.[12]

Figure 1

(a) Smartphone photography showing inferior crescent shaped defect. (b) Slitlamp examination showing superior Lasik flap displacement with inferior gaping. (c) Anterior Segment OCT confirming slitlamp findings

Immediate flap repositioning is advised in all cases to prevent epithelial ingrowth and diffuse lamellar keratitis.

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Conflicts of interest

There are no conflicts of interest.