ˌɛpɪθˈɛlɪəl ˈɪŋɡɹoʊθ ɪz ɐ lˈæsɪk kˌɑːmplɪkˈeɪʃən ɪnwˌɪtʃ sˈɛlz fɹʌmðə kˈɔːɹniə sˈɜːfɪs lˈeɪɚ ˌɛpɪθˈɛlɪəl sˈɛlz bɪɡˈɪn tə ɡɹˈoʊ ˌʌndɚnˈiːθ ðə kˈɔːɹniəl flˈæp.
Epithelial ingrowth is a LASIK complication in which cells from the cornea surface layer (epithelial cells) begin to grow underneath the corneal flap.