Certified Paraoptometric (CPO) Practice Exam 2025

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Which prefix indicates a backward position?

Intra-
Retro-
Hyper-
Ex-

The correct answer is: Retro-

The prefix that indicates a backward position is "retro-." This prefix comes from Latin, meaning "back" or "backward." It is commonly used in various medical terms, such as "retrograde," which refers to something moving backward or in the reverse direction. Understanding this terminology is essential in the medical field as it helps to accurately describe locations, processes, or movements relating to the body or medical conditions. The other prefixes listed do not convey the idea of a backward position. "Intra-" means within or inside something, "hyper-" indicates an excessive or above normal level, and "ex-" denotes a position out of or away from a particular place. These meanings clarify why "retro-" is the correct choice for indicating a backward position.