Which corneal finding is an area of corneal stroma dehydration and will result in fluorescein pooling in the affected areas?

Which corneal finding is an area of corneal stroma dehydration and will result in fluorescein pooling in the affected areas?

• A. Dellen
• B. Descemetocele
• C. Lipid keratopathy
• D. Macula

Answer: (A)

A dellen is a localized area of corneal stroma dehydration and thinning caused by an uneven tear film distribution. When the tear film is disrupted or insufficient in a particular spot—often at the edge of a lesion or near the eyelids—the corneal surface in that area dries out, the stroma becomes thin, and the tissue appears saucer-shaped. Because the surface is dehydrated and the tear film is compromised, fluorescein tends to pool in the affected area, producing a characteristic staining pattern that highlights the dry patch. This distinguishes it from true epithelial ulcers, which involve actual epithelial loss and different staining. Think of dellen as a dry patch on the cornea stemming from tear film instability; management centers on restoring a stable tear film and surface hydration. The other options describe different corneal conditions: a descemetocele involves a deep thinning exposing Descemet’s membrane with a high risk of perforation; lipid keratopathy involves lipid deposition in the cornea; macula refers to a stromal opacity not specifically due to dehydration or fluorescein pooling.

A dellen is a localized area of corneal stroma dehydration and thinning caused by an uneven tear film distribution. When the tear film is disrupted or insufficient in a particular spot—often at the edge of a lesion or near the eyelids—the corneal surface in that area dries out, the stroma becomes thin, and the tissue appears saucer-shaped. Because the surface is dehydrated and the tear film is compromised, fluorescein tends to pool in the affected area, producing a characteristic staining pattern that highlights the dry patch. This distinguishes it from true epithelial ulcers, which involve actual epithelial loss and different staining.

Think of dellen as a dry patch on the cornea stemming from tear film instability; management centers on restoring a stable tear film and surface hydration. The other options describe different corneal conditions: a descemetocele involves a deep thinning exposing Descemet’s membrane with a high risk of perforation; lipid keratopathy involves lipid deposition in the cornea; macula refers to a stromal opacity not specifically due to dehydration or fluorescein pooling.