The prefix Lens- means which action?

• A. Bend
• B. Twist
• C. Stretch
• D. Break

Answer: (C)

The action described by the prefix is stretching. Prefixes in medical terminology convey what a procedure or process does to a structure, and lens- is used to signal extending or lengthening rather than bending, twisting, or breaking. Think of stretching as drawing out length, which fits with lens- as a movement that increases the length or tension of something. So the best match is Stretch. The other actions—bending, twisting, or breaking—are indicated by different prefixes (for example, bend would align with flex- or curv-, twist with tors-, break with rupt- or fract-), so they don’t fit the meaning of lens-.