瑜伽師地論略纂 1.31

1.31

釋三色中，「是眼等所行」者，所遊歷義；「境界」者，所矚取義；「所緣」者，帶行相所籌慮義。

In explaining the three kinds of matter, 'the domain of the eye and the rest' means the sense of what is traversed; 'realm' means the sense of what is observed and apprehended; 'object' means the sense of what is contemplated by taking on its cognitive aspect (ākāra).