Which is a sign that the lens is inverted?

Which is a sign that the lens is inverted?

• A. Flared edges
• B. Edges flush and even
• C. Lens is perfectly centered
• D. No discomfort

Answer: (A)

When a soft lens is inside-out, the edge geometry changes so the edge doesn’t sit smoothly against the eye. The telltale sign is flared edges—the edge of the lens will appear to flare outward or curl away from the cornea. This happens because the lens isn’t following the natural contour of the eye when inverted. In contrast, a properly oriented lens shows edges that lie flush and even all around, sits centered on the cornea, and is usually comfortable. So the presence of edge flare points to inversion, whereas flush edges, centered lens, and no discomfort are consistent with correct orientation.

When a soft lens is inside-out, the edge geometry changes so the edge doesn’t sit smoothly against the eye. The telltale sign is flared edges—the edge of the lens will appear to flare outward or curl away from the cornea. This happens because the lens isn’t following the natural contour of the eye when inverted. In contrast, a properly oriented lens shows edges that lie flush and even all around, sits centered on the cornea, and is usually comfortable. So the presence of edge flare points to inversion, whereas flush edges, centered lens, and no discomfort are consistent with correct orientation.