What causes distortion immediately after a blink followed by clear mires when evaluating a soft lens?

Distortion immediately after a blink followed by clear mires when evaluating a soft lens is typically associated with a flat fitting lens. When a soft lens is fitted too flat for the cornea, it does not adequately align with the natural curvature of the eye. This misalignment leads to transient distortion of the visual image immediately following a blink. The moment of blinking temporarily alters the relationship between the lens and the corneal surface, causing visual disturbances until the lens repositions itself during the blink and stabilizes.

As the lens settles on the cornea, the mires, or visual reference points, can become clear, indicating that the lens is now properly centered and aligned with the corneal surface. This phenomenon highlights how important an accurate fit is for optimal vision, as a flat fit can lead to initial discomfort and distortion while still allowing for clarity post-blink as the lens adjusts.

Other factors, such as lens thickness or water content, affect comfort and wettability but do not typically cause immediate distortion paired with clarifying mires in the same way that improper curvature fit does.