Avaliação dos tonômetros de rebote tonovet® e tonovet plus® em aves domésticas e ultrassonografia ocular de tartarugas-marinhas

Abstract

The eye has evolved distinctly over the years and differences in physiological dynamics and in its macro and microstructures are reported between species, it is an obvious need, in the veterinary ophthalmology, to standardize and validate new devices for each animal group. The present study aimed to evaluate two devices for estimating intraocular pressure (IOP) in domestic birds, as well as the ophthalmic ultrasonographic evaluation of four species of sea turtles. For the first stage, three avian species were used (quail, domestic chicken and common pigeon), where the validation of the TonoVet® and TonoVet Plus® (TVPlus) devices and presentation of adjustment formulas were performed using the manometry methodology, that may bring the IOP estimate closer to the actual pressure. In this study, the presence of under or overestimation of IOP was verified in all evaluations of the two devices and in all calibrations, with the TVPlus in the rabbit calibration being the closest to the real pressure in ranges above 10mmHg. The second stage demonstrated the feasibility of using conventional 12MHz ultrasonography to assess the eye bulb in four species of sea turtles (Caretta caretta, Eretmochelys imbricata, Lepidochelys olivacea and Chelonia mydas), presenting conformational aspects and measurements of their ocular structures. The reduced difference found between the evaluated groups can reinforce the phylogenetic proximity and adaptations to similar habitats and habits among species. Finally, the two studies present data on the feasibility of the methodologies evaluated for each proposed species and may help in clinical investigations and reduce possible misinterpretations.