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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