Seeing the light despite the darkness
You might be misunderstanding what a gerund is or how it's formed. You do take see but you don't see+gerund, instead you do see+ing. Read belown
This whole thing is a gerund phrase; it has the gerund "Seeing," the direct object "light," and since a gerund is verbal it can be modified by an adverb or an adverb phrase, which here is an adverb prepositional phrase "despite the darkness" and like an adverb answers, "What?" "Despite or in spite of what?" The darkness.
without being prevented by (something)
to notice or become aware of (someone or something) by using your eyes
"3f. A gerund is a verb form ending in --ing that is used as a noun. A gerund is part verb and part noun. It is formed by adding --ing to the plain form of the verb."--Warriner's.
"3g. A gerund phrase consists of a gerund together with its complements and modifiers, all of which act together as a noun."--Warriners.
John E. Warriner. Warriner’s English Grammar and Composition. Third Course. Liberty Edition. Orlando, Florida: Harcourt, Brace, and Jovanovich. 1986. 102. 105.