Certified Paraoptometric (CPO) Practice Exam 2025

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Which medical root refers to the iris?

Opt
Irid
Core
Blephar

The correct answer is: Irid

The medical root that refers to the iris is indeed "Irid." This term originates from the Greek word "iris," which specifically denotes the colored part of the eye surrounding the pupil. In medical terminology, "Irid" is used in various contexts to describe conditions or procedures related to the iris, such as iridectomy (surgical removal of part of the iris) or iritis (inflammation of the iris). The other options relate to different parts of the eye or its functions. For instance, "Opt" is associated with vision or sight but does not specifically refer to the iris. The term "Core" pertains to the pupil, the opening in the center of the iris, rather than the iris itself. "Blephar" is connected to the eyelids, as in blepharitis, an inflammation of the eyelids. Hence, "Irid" is the correct choice related to the iris.