首楞嚴義疏注經 2.318

2.318

見謂識體，見緣即根，是增上緣，能生識故。所想相即境也，是所緣緣，牽生識故。下文云「想相為塵，識情為垢。」或可見即是根，見緣即境，所想相即識，此根境識即十八界，攝一切盡，即龍樹四句中因緣所生法也。

"Seeing" refers to the substance of consciousness. "The conditions of seeing" are the faculties, which are the predominant conditions (adhipati-pratyaya) because they can generate consciousness. "The characteristics of what is conceptualised" are the sense objects, which are the objective conditions (ālambana-pratyaya) because they draw forth and generate consciousness. The text below says: "The characteristics of thought are dust, and the sentiments of consciousness are defilement." Alternatively, seeing is the faculty, the conditions of seeing are the objects, and the characteristics of what is conceptualised are the consciousnesses; these faculties, objects, and consciousnesses are the eighteen dhātus, encompassing everything, which are the "dharmas arisen from causes and conditions" in Nāgārjuna's four lines.