Certified Paraoptometric (CPO) Practice Exam 2025 – All-in-One Study Guide to Ensure Exam Success!

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Which class of drugs causes temporary loss of feeling in a specific area?

Cycloplegic drugs

Anesthetic drugs

Anesthetic drugs are specifically designed to induce a temporary loss of sensation in a targeted area of the body. This ability to block nerve signals helps to alleviate pain during medical procedures or examinations. In the context of eye care, local anesthetics can numb the surface of the eye, facilitating examinations or treatments without causing discomfort to the patient.

Cycloplegic drugs, while they do affect the eye by temporarily paralyzing the ciliary muscle and dilating the pupil, do not cause a loss of feeling in the way anesthetic drugs do. Ophthalmic stains are used to highlight certain areas of the eye for diagnostic purposes and do not numb the tissue. Topical agents may refer to a wide variety of products used on the skin or other surfaces, and while some may have numbing properties, they are not specifically classified as anesthetics.

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Ophthalmic stains

Topical agents

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