Certified Paraoptometric (CPO) Practice Exam 2025

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What does the suffix '-al' typically indicate in medical terminology?

Pertaining to
Double
Color
Pupil

The correct answer is: Pertaining to

The suffix '-al' is commonly used in medical terminology to indicate "pertaining to." This means that when a term ends in '-al,' it is often describing a relationship to the subject in question. For instance, in words like "cardiac" (pertaining to the heart) or "renal" (pertaining to the kidney), this suffix helps convey a specific connection to those anatomical structures. Understanding this suffix is crucial for interpreting and communicating effectively in the medical field. The other options relate to different concepts that do not align with the definition associated with '-al.' For example, "double" is represented by the prefix 'di-' or 'bi-,' while color is indicated by terms such as 'chromatic,' and 'pupil' refers specifically to a part of the eye, not a suffix indicating a relationship.