Normal intraocular echo-biometric indices of adult dogs

The purpose of this study was to describe the ultrasonographic appearance and to measure different intraocular echo-biometric indices in normal adult dogs. B-mode transcorneal ultrasonographic scanning of left and right eyes of six healthy adult dogs each from three different breeds viz. German shepherd, Labrador retriever and Indian mongrels were performed. Qualitative echo-biometric findings of the eyes were described and measurements of the intraocular structures were obtained. In the present transcorneal intraocular echobiometric study six parameter were measured, i.e., aqueous chamber depth (ACD), lens depth (LDe), lens diameter (LDi), vitreous depth (VD), sclero-retinal rim thickness (SRT), and globe axial length (GAL) by using high end ultrasound machine (Mylab30vet), with 2.5–7.5 MHz microconvex transducer and the depth of scanning was set at 5–9 cm with suitable gain without administration of any general/local anaesthetic. Nonsignificant difference (P>0.05) was observed in all parameters when compared between left and right eye of different breeds of animals. The average values of LDi and GAL of both eyes of German shepherd dog were significantly different from Labrador retriever and Indian mongrel dogs. The average value of SRT of both eyes of German shepherd and Labrador were significantly higher (P<0.05) than Indian mongrel dogs. Average values of ACD, LDe and VD of left and right eyes did not differ significantly (P>0.05) among three breeds of dog.