A nurse is caring for a 7-year-old child in the urgent care with complaints of blurred vision. The nurse should complete which of the following as the priority action?

A. Administering saline drops may be appropriate if there is a foreign body or irritation, but it is not the priority in a case of blurred vision. B. The priority is to assess the child's visual acuity to determine the severity and possible cause of the blurred vision. This is essential to guide further diagnostic steps. C. Cleansing the eyes may be helpful if there is visible debris or infection, but it is not the first priority in assessing blurred vision. D. Obtaining a history is important but would follow after the visual acuity assessment, as it can help provide context for the symptoms.