What term describes the artificial enlargement of the pupils?

What term describes the artificial enlargement of the pupils?

• A. Dilation
• B. Miosis
• C. Constriction
• D. Anisocoria

Answer: (A)

Dilation describes the enlargement of the pupil. It occurs when the iris dilator muscle (the radial muscle) pulls the pupil open, typically under sympathetic control or due to agents that block constriction. When this enlargement is produced by drugs or artificial stimulation, it’s often called mydriasis. The opposite terms—miosis or constriction—refer to pupil narrowing, and anisocoria means the pupils are of unequal size. So artificial enlargement is best described by dilation.

Dilation describes the enlargement of the pupil. It occurs when the iris dilator muscle (the radial muscle) pulls the pupil open, typically under sympathetic control or due to agents that block constriction. When this enlargement is produced by drugs or artificial stimulation, it’s often called mydriasis. The opposite terms—miosis or constriction—refer to pupil narrowing, and anisocoria means the pupils are of unequal size. So artificial enlargement is best described by dilation.