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Light-near dissociation is a phenomenon observed when there is a differential reaction of the pupils to light and accommodation. In this condition, the pupils show a normal response to accommodation (the process of adjusting the focus for near vision) but have reduced or no response to light. Thus, pupils that are reactive only to accommodation demonstrate this characteristic.

This specific pupil response is often seen in certain neurological conditions and indicates that the pathways for light response are affected while the accommodation pathways remain intact. Understanding light-near dissociation is crucial in ophthalmology as it helps clinicians assess and diagnose underlying neural issues.