Which of the following actions is appropriate when administering an ophthalmic solution?

When administering an ophthalmic solution, placing the solution above the conjunctival sac is the appropriate action. This technique is essential because it allows for controlled instillation of the medication without directly contacting the eye, which can cause discomfort or irritation. By positioning the dropper above the conjunctival sac, the medication can flow into the eye through blinking, ensuring proper distribution over the surface of the eye.

Squeezing the bottle harder for a larger dose is not advisable, as administering too much medication can lead to wastage and increase the risk of systemic absorption or adverse effects. Instilling the solution directly into the eye can also increase the chance of contact with the cornea or conjunctiva, causing potential irritation or injury. Moreover, placing the solution in the outer cornea is not effective because optimal absorption occurs when the drops are administered in the conjunctival sac where they can spread across the ocular surface. Thus, the method of placing the solution above the conjunctival sac strikes a balance between effective medication delivery and patient safety.