What medication should a nurse anticipate administering to protect an eye with a lost blink reflex?

The correct choice for protecting an eye with a lost blink reflex is cyclosporine. This medication is used primarily to manage conditions associated with dry eyes, such as keratoconjunctivitis sicca. The lost blink reflex can lead to decreased lubrication and protection of the cornea, resulting in discomfort and potential damage. Cyclosporine works by increasing tear production, thereby providing moisture and protection to the ocular surface, especially in patients who have insufficient tear production.

Loteprednol is a corticosteroid that reduces inflammation but does not specifically enhance tear production. Tetryzoline is a decongestant used to relieve redness in the eyes but does not address lubrication or dry eye symptoms. Olopatadine is an antihistamine used primarily for allergic conjunctivitis and would not provide the necessary protective effect for a lost blink reflex. Thus, cyclosporine is the most suitable choice for maintaining corneal health in the absence of a normal blink response.