An anterior segment OCT that shows thinning of the cornea is an indication of:

An anterior segment OCT that shows thinning of the cornea is an indication of:

• A. Cataract
• B. Keratoconus
• C. Astigmatism
• D. Glaucoma

Answer: (B)

Thinning of the cornea on anterior segment OCT signals an ectatic corneal disorder, most characteristically keratoconus. In keratoconus the cornea becomes progressively thinner, often the thinnest point is inferior, and this thinning leads to a cone-shaped protrusion with irregular astigmatism. OCT pachymetry or corneal thickness maps will show a localized reduction in stromal thickness at the cone apex, which helps distinguish this condition from others. Cataract is a lens opacity and would not present as corneal thinning on anterior segment imaging. Glaucoma centers on optic nerve damage and intraocular pressure, not thinning of the cornea as the primary sign (though corneal thickness can influence IOP readings). Astigmatism is a refractive error due to corneal curvature; thinning itself isn’t required for its diagnosis, whereas keratoconus often causes irregular, progressive thinning.

Thinning of the cornea on anterior segment OCT signals an ectatic corneal disorder, most characteristically keratoconus. In keratoconus the cornea becomes progressively thinner, often the thinnest point is inferior, and this thinning leads to a cone-shaped protrusion with irregular astigmatism. OCT pachymetry or corneal thickness maps will show a localized reduction in stromal thickness at the cone apex, which helps distinguish this condition from others. Cataract is a lens opacity and would not present as corneal thinning on anterior segment imaging. Glaucoma centers on optic nerve damage and intraocular pressure, not thinning of the cornea as the primary sign (though corneal thickness can influence IOP readings). Astigmatism is a refractive error due to corneal curvature; thinning itself isn’t required for its diagnosis, whereas keratoconus often causes irregular, progressive thinning.