Final answer:
The presence of relative afferent pupillary defect (RAPD) is the most urgent concern requiring intravenous steroids to prevent vision loss, suggesting severe optic nerve dysfunction.
Step-by-step explanation:
The most important concern of the ophthalmologists in a patient requiring emergency intravenous steroids to save her vision is 4) the presence of relative afferent pupillary defect (RAPD). RAPD indicates a severe asymmetry in the function of the optic nerves, typically arising from optic neuritis or severe retinal disease, which can be vision-threatening. This is a more urgent issue than conjunctival congestion, eyelid issues, or movement restrictions, which, while serious, are usually less indicative of conditions that might immediately threaten sight.