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Juniper Publishers - The Flash Electroretinogram of Burrowing Owl – Athene cunicularia - JOJ Ophthalmology

Juniper Publishers - Open Access Journal of JOJ Ophthalmology 

Authored by Luiz Reis Barbosa Junior

Background: The burrowing owl (Athene cunicularia) has peculiar visual capacity, presenting conspicuous vision, what can be justified, among other motives, by the presence of cones and rods in the macula and the existence of double cones. The Athene cunicularia presents retinal cell circuit highly organized and complex, with presence of two foveae. Thickening in the ganglion cell layer surrounding the fovea contributes to the change of the refractive index of the retina at this location, thus increasing the sensitivity for detecting motion. The high concentration of photoreceptors in the fovea is the cause of the maximum optical resolution of this region.

Results: We conduct a transversal observational study according to the protocol of the International Society for Clinical Electrophysiology of Vision (ISCEV) that aims at evaluating the retinal response of the species after stimulation with white light, both in photopic and scotopic stimuli. The verification of the p-value and t-value, we obtained for the variables, respectively: a-wave amplitude - 0.02 and 2.94; b-wave amplitude - 0.12 and 1.76; b-wave time culmination - 0.07 and 2.12;b-wave latency - 0.74 and 0.34.

Conclusion:In order to standardize the variables of the electroretinogram of the species, the authors propose to evaluate the electroretinogram components under white light in both stimuli, providing electrophysiological data from the visual stimulation of retinal species, encouraging the Biological Sciences with substrate for future research and clinical evaluations.

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