Modified Schirmer tear test and rebound tonometry in blue-fronted Amazon parrot (Amazona aestiva)

Abstract

ABSTRACT: The aim of this study was to describe the modified Schirmer tear test (mSTT), intraocular pressure (IOP) by rebound tonometry and palpebral fissure length (PFL) in blue-fronted Amazon parrots (Amazona aestiva). Thirty-five healthy adult animals from a conservation breeding center in Brazil were used in this study. Modified Schirmer tear test, rebound tonometry and PFL measurements were performed in both eyes, with birds under physical restraint. Mean mSTT was 6.2±0.1mm/min and mean IOP was 6.4±0.1mmHg, while PFL was 10.1±0.1mm. A moderate correlation was seen between mSTT and PFL for OD (ρ=0.14) and OS (ρ=0.20). The results provide ophthalmic tests reference values for A. aestiva.

Keywords

• Schirmer tear test
• tonometry
• Amazon parrot
• Amazona aestiva
• birds
• lacrimal production
• intraocular pressure
• palpebral fissure length
• wild animals