# Peters Anomaly in a Miniature Schnauzer Documented by Spectral‐Domain Optical Coherence Tomography: A Case Report

## TL;DR

A 10-month-old dog had Peters anomaly in its eye, confirmed using advanced imaging for the first time in a canine case.

## Contribution

First documentation of Peters anomaly in a dog using spectral-domain optical coherence tomography.

## Key findings

- SD-OCT revealed focal absence of Descemet's membrane and corneal endothelium defect.
- Iridocorneal adhesions were observed extending from the iris to the cornea.
- This case confirms Peters anomaly in a Miniature Schnauzer using non-invasive imaging.

## Abstract

A 10‐month‐old intact male Miniature Schnauzer was presented for evaluation of a unilateral corneal opacity in the right eye. Ophthalmic examination revealed a broad paraxial corneal opacity involving the posterior stroma to the Descemet's membrane, with multiple strands of tissue extending from the iris collarette to the posterior cornea. Spectral‐domain optical coherence tomography (SD‐OCT) revealed focal absence of the Descemet's membrane and a defect in the corneal endothelium in the affected area. Based on the clinical and imaging findings, the case was diagnosed as Peters anomaly. To the authors' knowledge, this is the first report of Peters anomaly in a dog documented by SD‐OCT.

This case highlights Peters anomaly in a dog, documented by spectral‐domain OCT, demonstrating focal absence of Descemet's membrane and iridocorneal adhesions. OCT provides in vivo confirmation of congenital anterior segment dysgenesis and is a valuable non‐invasive tool for veterinary diagnosis and education.