Final answer:
To address disturbed visual-sensory perception caused by homonymous hemianopsia in a patient with a right-sided brain stroke, the nurse should cover the unaffected eye to promote visual adjustment.
Step-by-step explanation:
When caring for a patient with a right-sided brain stroke and disturbed visual-sensory perception due to homonymous hemianopsia, the nurse should take early actions to promote visual adjustment. Therefore, the nurse should cover the unaffected eye to help the patient adjust to their limited field of vision. This intervention can enhance the patient's visual functioning and reduce their visual disturbances. Administering pain medication or initiating physical therapy would not directly address the nursing diagnosis related to visual-sensory perception, and speech therapy would also not be the most appropriate intervention for a visual deficit.