NACA Animal Control Officers Test 2026 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 575

What condition can cause pupils to change from mitotic to mydriatic?

Normal response to light

Brain herniation

The transition of pupils from a mitotic (constricted) state to a mydriatic (dilated) state is commonly associated with serious medical conditions, one of which is brain herniation. This occurs when there is pressure on the brain due to swelling, bleeding, or other factors, causing the brain to shift from its normal position. The increased intracranial pressure can affect the neural pathways that control pupil size, leading to an uncontrolled dilation of the pupils.

In contrast, a normal response to light results in constriction of the pupils, while age-related changes generally produce a slow and gradual alteration in pupil size, not an abrupt shift. Allergic reactions may cause some eye swelling or discomfort but do not typically cause a significant change in pupil dilation. Understanding the implications of pupil size changes is vital in recognizing potential emergencies like brain herniation.

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Age-related changes

Allergic reaction

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