Avaliação de parâmetros clínicos oftálmicos, eletrofisiológicos, ecobiometria ocular em modo B e dopplervelocimetria da artéria oftálmica em Gavião-carijó (Rupornis magnirostris, Gmelin, 1788)

Abstract

Rupornis magnirostris is a common bird of prey in Brazil. Often seen in the wild, they are also commonly kept in captivity for many different reasons, such as trauma, mutilations, seizures or after apprehensions of wild life traffic. These animals often suffer from different problems that affect the visual system. This study aimed to evaluate the clinical parameters of the ophthalmic exam including electrophysiological, ocular biometry B-mode and Doppler velocimetry of the ophthalmic artery. Clinical ophthalmic examination data was collected, these included tear production (Schirmer tear test), corneal sensitivity test (esthesiometry Cochet Bonnet) and intraocular pressure (tonometry rebound); results were evaluated regarding different age ranges. Retinal quantitative function analysis was performed with white light and different wavelengths (full-field electroretinogram), analysis of the visual pathways (light flash visual evoked potential), ultrasound biometry (B-mode echobiometry of the eye) and Doppler indices of resistance and pulsatility of the ophthalmic artery (triplex ultrasound). Lacrimal Schirmer test was the only clinical parameter of the ophthalmic exam that had no age group differences. This may be due this tests direct relation with corneal sensibility considering age range. In ocular electrophysiology the visually evoked potentials elicited by flash stimuli varied significantly with increase in age; the spectral sensitivity study responded to five different wavelengths; electroretinogram was significantly influenced by anesthesia, increasing photopic implicit time and amplitude of b waves and flicker 30Hz. B mode echobiometry demonstrated a relation between the anterior chamber and lens as well as the lens and the vitreous chamber. ophthalmic artery Doppler velocimetry had a significant relationship between pulsatility and resistivity index, as well as with their intraocular pressure as well as a significant ratio of the peak systolic velocity and end diastolic velocity. These results open new horizons for ornithological ophthalmology, regarding clinical ophthalmology, electrophysiological, B mode echobiometry and Doppler velocimetry.