Ultrasonographic aspects and biometry of Striped owl's eyes (Rhinoptynx clamator).
OBJECTIVE
To report the biometric values and ultrasonographic aspects of the normal eye of the Striped owl (Rhinoptynx clamator). Sample population  Twenty-seven healthy, free-living, adult Striped owls from the Ecological Park of Tiete Veterinary Ambulatory (Sao Paulo, Brazil).


METHODS
Both eyes of all owls underwent B-mode ultrasonographic examination and biometry was performed for lens axial length (WL), depth of the anterior (AC) and vitreous (VC) chambers, axial length of the globe (LB) and the pecten oculi (LP) of both eyes, using a 12 MHz probe. The owls were manually restrained without sedation and the eyes were topically anesthetized.


RESULTS
Biometric and statistical findings were as follows: in the left eye, the means and standard deviations were: LB = 23.76 ± 0.92 mm, WL = 7.79 ± 0.27 mm, AC = 4.27 ± 0.47 mm, VC = 11.36 ± 0.29 mm and LP = 5.69 ± 0.50 mm; in the right eye, the values were: LB = 24.25 ± 0.79 mm, WL = 8.03 ± 0.40 mm, AC = 4.56 ± 0.52 mm, VC = 11.40 ± 0.25 mm, and LP = 5.68 ± 0.41 mm. No significant differences were found between left and right eyes measurements of LB, WL, AC, VC, and LP dimensions.


CONCLUSIONS
Ocular ultrasound aspects and biometric values of the Striped owl are reported. The study's results provide means for various ocular measurements. The ultrasound is an easy and safe exam to be performed in the Striped owl's eyes.
Squarzoni
Renata
R
Laboratory of Investigation on Comparative Ophthalmology, School of Veterinary Medicine, University of Sao Paulo, Sao Paulo, SP, Brazil. renatasq@usp.br
Perlmann
Eduardo
E
Antunes
Andrea
A
Milanelo
Liliane
L
de Moraes Barros
Paulo Sérgio
PS
D000818:Animals; D001699:Biometry; D005123:Eye / Q000000981:diagnostic imaging*; D020305:Strigiformes / Q000033:anatomy & histology*; D014463:Ultrasonography