Which of the following is NOT a cone type associated with Keratoconus?

In keratoconus, the cornea undergoes a progressive thinning and steepening that leads to various cone shapes, which are classified based on their configuration. The commonly identified cone types include nipple, oval, and globus.

The nipple cone is characterized by a small, steep protrusion in the central cornea. The oval cone presents a more extended shape, typically wider in the horizontal meridian compared to the vertical one. The globus cone has a more rounded and smooth appearance that can encompass a larger area of the cornea.

Elongated cones, however, are not specifically recognized as a classic type in the context of keratoconus. While variations in corneal shape can occur, the elongated classification does not fit within the typical framework used for describing the cones associated with keratoconus. Thus, identifying elongated as not being a standard cone type associated with keratoconus helps clarify the established nomenclature used in the understanding of this ocular condition.