What does the term 'dimple veiling' refer to in contact lenses?

The term 'dimple veiling' specifically refers to indentations or small depressions that can occur in the corneal epithelium, primarily as a result of air bubbles being trapped under a contact lens during its application or wear. When these air bubbles form, they can create pressure points that indent the epithelial layer of the cornea, leading to an appearance of dimples when viewed under a slit lamp. This phenomenon is associated with the wearing of contact lenses, particularly rigid gas permeable types, and can affect comfort and clarity of vision. Understanding this term is critical for recognizing potential issues related to contact lens wear and ensuring proper lens management.