What term describes the least distance from the plane of the endpoints to the point of the curve furthest from this plane?

The term "Sagittal Depth" accurately describes the least distance from the plane of the endpoints to the point of the curve that is furthest from this plane. In optics, particularly when addressing lens design or the curvature of similar objects, sagittal depth refers to how deep a curve is relative to a baseline or reference plane drawn across the endpoints of that curve.

Measuring this depth is essential for optimizing lens performance and fitting, as it impacts how light is refracted and ultimately how the lens functions in providing vision correction. Understanding sagittal depth helps opticians and eyewear designers create lenses that align properly with the anatomy of the eye, ensuring comfort and visual clarity.

Other terms, while related to geometry and optics, do not convey the same specific meaning as sagittal depth in this context. For example, sagittal height typically refers to the vertical height of a curved surface rather than the depth measurement being sought. Similarly, sagittal angle and sagittal line do not pertain to the distance from the endpoint to the highest point of the curve, which is what sagittal depth represents. Thus, recognizing this precise definition is crucial for those in the optical field.