俱舍論疏 2.178

2.178

論「於見色時為一眼見」，下有五頌，因論生論，分別根境、識，非是諸門分別十八界義。初半頌分別一眼二眼見色之義。有部等計二眼同時而見，犢子部計兩眼互見，非同時見，處隔越故、速疾轉故，謂同時見。《婆沙》十三破云「若一眼見非二眼者，身諸分亦應不俱時覺觸。如身兩臂相去雖遠，而得俱時覺觸生一身識。兩眼亦爾，相去雖遠，何妨俱時見色生一眼識？」

On the Śāstra's statement: "When seeing visible form, is it seen by one eye?": below there are five verses where, occasioning one discussion from another, he differentiates sense-faculties, sense-objects, and consciousnesses; this is not the section on analyzing the eighteen dhātus through various classifications. The first half-verse analyzes the meaning of seeing visible form with one eye or two eyes. The Vaibhāṣikas and others maintain that two eyes see simultaneously. The Vātsīputrīyas maintain that the two eyes see alternately, not simultaneously; but because their locations are adjacent and their operation is rapid, one considers them to see simultaneously. The Vibhāṣā, fascicle 13, refutes this, saying: "If seeing were by one eye and not by two eyes, the various parts of the body also should not simultaneously perceive touch. Just as the two arms of the body, though separated by distance, can simultaneously perceive touch and produce a single body-consciousness, the two eyes are likewise: though separated by distance, what prevents them from simultaneously seeing visible form and producing a single eye-consciousness?"