iridoconstrictor

Example:During an eye examination, the ophthalmologist determined that the iris-constricting muscle was functioning properly.

Definition:A muscle that causes the iris to constrict or become smaller, typically in response to light or focusing on a near object.

Example:The ciliary muscle and the iridoconstrictor work together to ensure clear vision across a wide range of distances.

Definition:A smooth muscle, separate from the iridoconstrictor, located within the ciliary body of the eye, which controls the shape of the lens and thus aids in focusing vision.