A client with glaucoma is prescribed a prostaglandin agonist. Which client statement indicates a lack of understanding of the regimen?

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Prostaglandin agonists lower intraocular pressure by increasing the outflow of aqueous humor, and they’re given as a daily eye drop in the eye (or eyes) that are affected. The key to the regimen is which eye actually has elevated pressure, not differences in eye color. Iris color changes and eyelash growth are known side effects, but they don’t drive whether you treat both eyes. Saying you’ll use the drops in both eyes because the eyes may be different colors shows a misunderstanding: you treat the eye with higher pressure, or both eyes if both are affected. The other statements align with proper use—don’t overmedicate, and be aware of possible eyelash changes.