Is posterior polymorphous corneal dystrophy an ectatic disease?

SUMMARY A six-year-old male patient, who was noticed to have low vision and was referred to a physician, was referred to our clinic with a preliminary diagnosis of keratoconus from an external center. The best corrected visual acuity was 0.3 (-4.0 -3.0?10) in the right eye and 0.2 (-4.50 -3.50?170) in the left eye. In the anterior segment examination, vesicular lesions were present on the posterior surface of the cornea, more in the periphery, in both eyes. In specular microscopy, dark foci with mild polymegatism and pleomorphism, mean endothelial cell count was 2.283±212 cells/mm2 in the right eye and 2.268±189 cells/mm2 in the left. Topographic examination revealed a bilaterally symmetrical bow-tie and severe corneal steepening (mean keratometry 56.5 D in the right eye and 57.1 D in the left eye). The thinnest corneal thickness was 719 µ in the right eye and 728 µ in the left eye. Posterior corneal elevation values ​​were higher than normal (+37 µ on the right, +43 µ on the left). In this study, ectatic findings detected in a case diagnosed with posterior polymorphous corneal dystrophy are discussed.

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