Agents that mimic the sympathetic nervous system bring about pupillary dilation, while cycloplegic agents cause paralysis of the ciliary muscles and prevent accommodation. These medications are used primarily for diagnostic testing.

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This statement is true. Sympathomimetic agents dilate the pupils, while cycloplegic agents paralyze the ciliary muscles and prevent accommodation. These medications are commonly used in diagnostic testing, such as eye exams.

Agents That Mimic the Sympathetic Nervous System Bring About Pupillary