[556] Which is that form (rūpa) that is the basis (vatthu) of feeling (vedanā) born of eye-contact (cakkhusamphassa) … of perception (saññā) … of volition (cetanā) … of eye-consciousness (cakkhuviññāṇa)?
The eye sense base (cakkhāyatana) — this is that form that is the basis of eye-consciousness.
Which is that form that is not the basis of eye-consciousness?
The ear sense base (sotāyatana) … edible food (kabaḷiṅkāra āhāra) — this is that form that is not the basis of eye-consciousness.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.