Which finding would prompt lash epilation during blepharitis evaluation?

• A. Amblyopia
• B. Collarettes
• C. Corneal edema
• D. Retinal detachment

Answer: (B)

In blepharitis evaluation, sampling the lashes is most likely to be prompted when Demodex infestation is suspected. The telltale sign is collarettes—cylindrical, dandruff-like scales at the base of the eyelashes. These collarettes indicate debris associated with mite colonization in the lash follicles, so epilating a few lashes for microscopic examination helps confirm Demodex. Other options aren’t related to lash sampling or Demodex detection, as amblyopia concerns vision development and the others relate to deeper ocular or retinal conditions.