What needs to be determined using the Edge Flare method?

The Edge Flare method is specifically used to determine whether a lens is inverted. When examining a lens using this technique, practitioners look at the lens edges to identify the orientation of the lens. If the lens is inverted, the edge flare will not match the expected curvature and positioning, leading to an incorrect fit or compromised performance in vision correction.

In contrast, the other options relate to different aspects of lens evaluation or management. Ensuring a proper fit is assessed through other fitting techniques and parameters, lens damage requires a thorough visual inspection for scratches or cracks, and determining if a lens needs cleaning typically involves assessing its cleanliness through surface inspection rather than the Edge Flare method. Therefore, focusing on the edge flare is pertinent for confirming the orientation and proper alignment of the lens.