ðeɪ ɑːɹ ɐtˈætʃt baɪ ðɛɹ pɚɹˈɪfɚɹi tə θɹˈiː ɔːɹ fˈoːɹ ʌvðə ɹˈɪdʒᵻz ʌvðɪ ɔːɹbˈɪkjʊləs sˈɪlɪɹˌɪs, ænd ɑːɹ kəntˈɪnjuːəs wɪððə lˈeɪɚz ʌvðə kˈoːɹɔɪd: ðɛɹ ˈɑːpəzˌɪt ɛkstɹˈɛmᵻɾiz ɑːɹ fɹˈiː ænd ɹˈaʊndᵻd, ænd ɑːɹ dᵻɹˈɛktᵻd təwˈɔːɹd ðə pɑːstˈɪɹiɚ tʃˈeɪmbɚɹ ʌvðɪ ˈaɪbɔːl ænd sɜːkˈʌmfɹəns ʌvðə lˈɛnz.
They are attached by their periphery to three or four of the ridges of the orbiculus ciliaris, and are continuous with the layers of the choroid: their opposite extremities are free and rounded, and are directed toward the posterior chamber of the eyeball and circumference of the lens.