Physiological transpalpebral sonographic eye measurements from healthy adult horses

Author:

da Conceição Mariana Lopes1,Apolonio Emanuel Vitor Pereira1,Alonso Juliana de Moura1ORCID,de Ávila Alice Ribeiro1,Rosa Gustavo dos Santos1,Stievani Fernanda de Castro1,Rodrigues Celso Antônio1,Watanabe Marcos Jun1,Hussni Carlos1,Alves Ana Liz Garcia1

Affiliation:

1. Department of Veterinary Surgery and Animal Reproduction School of Veterinary Medicine and Animal Science of São Paulo State University (UNESP) Botucatu Brazil

Abstract

SummaryBackgroundRelevant ophthalmic lesions affecting vision occur in 5%–10% of all horses. Thus, knowledge of anatomy, physiology, clinical and imaging is essential for the discernment of a healthy and a pathological eye. Ultrasonography is an important diagnostic tool for ocular diseases, providing information on lesion site, extension and severity. In addition, it is possible to monitor the treatment efficiency and prognosis.ObjectivesThis study aimed to provide biometric data about the ocular globe structures of healthy horses in order to establish a normal ultrasonographic pattern.MethodsOcular globes (n = 40) from 20 healthy horses were evaluated by transpalpebral B‐mode ultrasonography, using an 11 MHz linear transducer.ResultsThe biometrics found in this study were: globe length: 37.78 ± 0.65 mm; anterior chamber: 5.01 ± 0.27 mm; vitreous chamber: 19.19 ± 0.54 mm; lens: 12.82 ± 0.93 mm; cornea: 0.88 ± 0.11 mm.Main limitationsThe obtained results can be more safely applied to medium‐sized horses (350 ± 43 kg).ConclusionsThis study provides normal ocular biometrics that can be used as a reference for the diagnosis of ocular diseases, especially when the lesions are bilateral and nontranslucent cornea hinder internal structures evaluation.

Funder

Fundação de Amparo à Pesquisa do Estado de São Paulo

Publisher

Wiley

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