Disorder characterized by inferior punctate epithelial erosion caused by drying from CLs wear and minimal wiping with tears

Disorder characterized by inferior punctate epithelial erosion caused by drying from CLs wear and minimal wiping with tears

• A. bacterial conjunctivitis
• B. allergic conjunctivitis
• C. keratoconjunctivitis sicca
• D. desiccation ("smile staining")

Answer: (D)

Desiccation of the ocular surface from tear film drying under a contact lens is the idea being tested. When a lens reduces tear exchange and the tear film breaks up, the inferior corneal epithelium can become dry, producing tiny punctate erosions that fluoresce with staining. This pattern is classically described as desiccation staining, sometimes called “smile staining” because the staining often forms a curved, smile-like arc along the inferior cornea or limbus. It’s a finding tied specifically to drying caused by lens wear and inadequate tear clearance, rather than a generalized inflammatory process. Bacterial conjunctivitis would show mucopurulent discharge and diffuse conjunctival involvement; allergic conjunctivitis presents with itching, tearing, and marked conjunctival changes like papillae; keratoconjunctivitis sicca is dry eye disease overall but doesn’t emphasize the distinctive inferior desiccation pattern associated with contact lens wear.

Desiccation of the ocular surface from tear film drying under a contact lens is the idea being tested. When a lens reduces tear exchange and the tear film breaks up, the inferior corneal epithelium can become dry, producing tiny punctate erosions that fluoresce with staining. This pattern is classically described as desiccation staining, sometimes called “smile staining” because the staining often forms a curved, smile-like arc along the inferior cornea or limbus. It’s a finding tied specifically to drying caused by lens wear and inadequate tear clearance, rather than a generalized inflammatory process.

Bacterial conjunctivitis would show mucopurulent discharge and diffuse conjunctival involvement; allergic conjunctivitis presents with itching, tearing, and marked conjunctival changes like papillae; keratoconjunctivitis sicca is dry eye disease overall but doesn’t emphasize the distinctive inferior desiccation pattern associated with contact lens wear.