Which light-near disassociation chiefly impacts the ciliary ganglion?

The ciliary ganglion plays a crucial role in the autonomic control of the eye, particularly in regulating the constriction of the pupil and accommodating the lens for focusing on near objects. Among the choices provided, Adie's pupil is characterized by a light-near dissociation due to the impairment of the parasympathetic fibers that normally facilitate pupillary constriction in response to light. In this condition, patients may exhibit a dilated pupil that constricts poorly to light but accommodates well to near vision, reflecting a specific dysfunction at the level of the ciliary ganglion.

In contrast, tonic pupils present with a similar but less pronounced light-near dissociation, while Horner's syndrome is associated with a sympathetic pathway disturbance leading to miosis, ptosis, and anhidrosis but doesn't primarily involve the ciliary ganglion’s functionality regarding near accommodation. Argyll Robertson pupils, which are associated with neurosyphilis, demonstrate a lack of constriction in response to light but retain the ability to constrict with accommodation, indicating preserved function of some neural pathways.

Adie’s pupil specifically reflects a dysfunction affecting the ciliary ganglion, making it the clearest representation of light-near dissociation within the context of this question.