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Posterior Polymorphous Corneal Dystrophy in a Pediatric Population.

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Posterior polymorphous corneal dystrophy (PPCD) often presents unilaterally in children, causing astigmatism and amblyopia. Early diagnosis and regular follow-ups are crucial for managing this rare genetic eye condition.

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Area of Science:

  • Ophthalmology
  • Genetics
  • Pediatric Eye Care

Background:

  • Posterior polymorphous corneal dystrophy (PPCD) is a rare, inherited eye disorder.
  • It affects the cornea's innermost layers, potentially leading to vision impairment.
  • Understanding its presentation in children is vital for timely intervention.

Purpose of the Study:

  • To evaluate the clinical and topographic features of PPCD in pediatric patients (≤15 years).
  • To assess long-term outcomes and identify key diagnostic indicators in children.
  • To compare affected eyes with unaffected contralateral eyes in unilateral cases.

Main Methods:

  • Retrospective case series of pediatric PPCD patients diagnosed between 1999-2020.
  • Data included demographics, clinical findings (slit lamp, refraction, visual acuity), corneal topography, and specular microscopy.
  • Analysis focused on differences between affected and unaffected eyes in unilateral cases.

Main Results:

  • Nineteen patients (27 eyes) with PPCD were analyzed; 11 cases were unilateral.
  • Affected eyes showed significant differences in endothelial cell density and hexagonality compared to unaffected eyes.
  • Initial presentation included astigmatism and amblyopia, with resolution in some cases after treatment.

Conclusions:

  • PPCD can manifest early in children, presenting with astigmatism and anisometropic amblyopia.
  • Unilateral presentation is more common in children than adults.
  • Regular monitoring with slit lamp exams and cycloplegic retinoscopy is essential for early detection and management of refractive amblyopia.