Ultrasonographic biometry of the normal eye of the Persian cat

Abstract

Regarding the breed predisposition of Persian cats to ocular problems, the present study provides baseline information for further clinical investigations of ocular abnormalities using B-mode ultrasonography.

Measurement of the anterior chamber depth and ocular axial length: transpalpebral B-mode ultrasound using an 18-MHz linear probe compared with the IOL Master 500

“…The Bland-Altman method showed a 0.25-mm and 0.45-mm LoA width in ACD and AL, which were similar or smaller than those observed by other authors [1,[22][23][24][25][26][27]. LoA width estimates the technique's variability and the range in which 95% of the variations between B-TUS and IOL Master 500 would be expected and is particularly useful in determining the possible clinical significance of the variations between the two techniques [14].…”

“…Some authors compared these two ultrasonic methods and reported better accuracy for the immersion B-scan, similar to the optical interferometry, suggesting that it may be a good alternative when optical techniques cannot be used [19,20]. The veterinary field has also used transocular B-mode ultrasound for optical biometry [21][22][23]. The B-TUS technique has not been well evaluated on humans for these purposes.…”

In this issue – July 2014

“…4 The cats had no history of previous ophthalmic disease and were restrained manually in sternal recumbency without sedation for the entire examination process. No significant difference was found between the ocular biometry of the left and right eyes or the horizontal and vertical planes, similar to other animal species.…”

“…A cross-sectional study of 20 healthy Persian cats investigated the normal biometry of the Persian cat eye using B-mode ultrasonography, and provided baseline information for clinical investigations of ocular abnormalities. 4 The cats had no history of previous ophthalmic disease and were restrained manually in sternal recumbency without sedation for the entire examination process. No significant difference was found between the ocular biometry of the left and right eyes or the horizontal and vertical planes, similar to other animal species.…”

Valores ecobiométricos e índice de resistividade da artéria oftálmica externa em catetos (Tayassu tajacu, Linnaeus, 1758)

“…A ecobiometria ocular foi descrita em espécies domésticas e em algumas silvestres, tais como chinchilas, gatos, coelhos, corujas, capivaras e macacos bugio-ruivo (Montiani-Ferreira et al, 2008;Lima et al, 2010;Squarzoni et al, 2010;Toni et al, 2010;Mirshahi et al, 2014;Souza et al, 2018). Soma-se aos estudos ecobiométricos a utilização do Doppler colorido, que é de grande interesse por permitir estudos hemodinâmicos, como condições de fluxo e mensurações de velocidade, caracterizando a impedância vascular (Diniz et al, 2004;Carvalho et al, 2009).…”