唯識二十論述記 2.133

2.133

述曰：釋頌「一」字。即敘彼宗，彼宗意說：若有隔別，眼所行境，體即是多。無隔別時，所有青等眼所行者，說為一物，其聲、香等，類色亦然。

Commentary: This explains the word "one" in the verse. That is, it presents their school's position. What their school means is: if there is an intervening division, the entities within the visual range are multiple. When there is no intervening division, all blue and the rest within the visual range are said to be a single thing; sound, odor, and the rest are analogized to form in the same way.