What does 'ambly' refer to in medical terminology?

In medical terminology, 'ambly' typically refers to something that is dull or impaired, particularly in the context of vision. The term is often associated with amblyopia, which is a condition characterized by decreased vision in one or both eyes due to abnormal visual development in childhood. This condition is sometimes referred to as "lazy eye" and leads to a lack of sharpness in the vision perceived by the affected eye. The other choices—sharp, young, and old—do not align with the definition of 'ambly,' highlighting why 'dull' is the most accurate interpretation in this context.