The eyes of tadpoles lack lids, but at metamorphosis, the cornea becomes more dome-shaped, the lens becomes flatter, and eyelids and associated glands and ducts develop.
ðɪ ˈaɪz ʌv tˈædpoʊlz lˈæk lˈɪdz, bˌʌt æt mˌɛɾəmˈoːɹfəsˌɪs, ðə kˈɔːɹniə bɪkˌʌmz mˈoːɹ dˈoʊmʃˈeɪpt, ðə lˈɛnz bɪkˌʌmz flˈæɾɚ, ænd ˈaɪlɪdz ænd ɐsˈoʊsɪˌeɪɾᵻd ɡlˈændz ænd dˈʌkts dɪvˈɛləp.