Final answer:
The nurse should instruct the spouse to administer the eye drops in the center of the lower lid.
Step-by-step explanation:
The nurse should instruct the spouse to administer the eye drops in the center of the lower lid, also known as the conjunctival sac. This allows the drops to be evenly distributed across the eye. Moving the dropper to the inner canthus can cause the drops to enter the tear duct instead of the eye. Having the client squeeze both eyes after administering the drops is not necessary and may cause the medication to be expelled. Having the client raise the eyebrows is also unnecessary for administering eye drops.