The nurse is assessing the eyes of a client who just received mydriatic eye drops. Which physiological function of the eye will not respond during the therapeutic period after administration of the eye drops?

A. Explain that the medication is not given to prevent pain: Scopolamine transdermal patches are primarily used to prevent nausea and vomiting associated with motion sickness or postoperative conditions, not for pain management. This explanation addresses the client's misunderstanding about the purpose of the medication and clarifies that scopolamine is not intended to relieve pain.
B. Offer to apply a new transdermal patch to relieve the pain: This is not appropriate because scopolamine is not used for pain relief. Applying a new patch will not address the client's pain, as the medication's purpose is not related to analgesia.
C. Advise the client that the effects of the medication have worn off: This is incorrect because scopolamine patches are typically used for prophylaxis against nausea and are effective for several days. The medication’s effects should not wear off within a few hours, and the patch is not designed to address pain.
D. Check for correct placement of the patch behind the client's ear: While ensuring the correct placement of the patch is important for its efficacy, the client’s pain indicates a misunderstanding of the patch’s purpose. The patch’s placement is not related to the pain the client is experiencing, as scopolamine is not meant to relieve pain.

A. Topical echinacea is usually used to soothe burns and can cause damage to the skin: While echinacea is sometimes used for skin conditions, this option inaccurately describes its use and safety. Echinacea is more commonly used for its potential immune-boosting properties rather than for treating burns. There is limited evidence that it can cause damage to the skin when used topically, although individual reactions can vary.
B. This product is essentially harmless but also is not very beneficial in treating skin infections: This response minimizes the potential benefits of echinacea. While echinacea's effectiveness in treating conditions like canker sores is debated, it is not accurate to dismiss it as not beneficial. The product's safety and potential effectiveness should be evaluated based on current evidence rather than outright dismissal.
C. Echinacea seems to be useful in the treatment of some infections, such as canker sores: This response acknowledges that echinacea may have some beneficial effects. Although evidence is mixed, some studies suggest that echinacea might have therapeutic properties for certain conditions, including canker sores. This response provides a balanced view of echinacea's potential benefits while still reflecting the current understanding of its effectiveness.
D. Many of the herbal preparations are helpful primarily because of their placebo effect: While it is true that some herbal preparations may have a placebo effect, this response does not address the specific use of echinacea for canker sores and can undermine the genuine potential benefits of herbal treatments. It is more appropriate to discuss the evidence supporting echinacea's use and potential benefits.