What does the suffix "-scopy" refer to in medical terms?

The suffix "-scopy" in medical terms refers specifically to a visual examination using a specialized instrument, often called a scope. This is commonly used in various medical procedures, such as endoscopy, colonoscopy, and otoscopy, where a doctor visually inspects the interior of a body cavity or organ. This visualization can assist in diagnosis, monitoring, and sometimes therapeutic interventions.

The other options do not accurately represent the meaning of "-scopy." While a surgical procedure or a diagnosis might involve visual examination, they don't exclusively define what "-scopy" means. Similarly, "a type of discharge" does not relate to visual examination, as the suffix does not encompass any aspects of bodily discharge or its analysis. Thus, the connection of "-scopy" to visual examination is the most precise and relevant interpretation in medical terminology.