title: Ultrasonographic biometry of the normal eye of the Persian cat.
abstract: OBJECTIVE
  To describe the normal ultrasonographic biometry of the Persian cat's eyes using B-mode ultrasonography.
  
  
  METHODS
  In a cross-sectional study, 20 healthy Persian cats with no history of previous ophthalmic disease were examined. Ocular biometry of the left and right eyes was measured using B-mode ultrasonography. Comparison of the average measurements between left and right eyes and between vertical and horizontal planes was performed using paired-sample t test. Correlation of ocular parameters with sex, age, head circumference and eye colour was evaluated.
  
  
  RESULTS
  Mean ± standard deviation (SD) measurements of the ocular structures of anterior chamber, lens thickness, vitreous chamber and anterior to posterior dimension of the globe in 40 eyes were 4.1 ± 0.7, 7.7 ± 0.5, 8.2 ± 0.4 and 20.7 ± 1.0 mm, respectively. No significant difference was found between the ocular biometry of the left and right eyes or the horizontal and vertical planes. Of the ocular parameters, the following had a significant positive correlation with head circumference: axial globe length, anterior chamber and lens thickness. The vitreous body had a positive correlation with age.
  
  
  CONCLUSIONS
  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.
authors: Department of Clinical Sciences, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, PO Box 91775-193, Mashhad, Iran. a.mirshahi@um.ac.ir.
authors: A
authors: A
authors: Mirshahi
authors: S H
authors: SH
authors: Shafigh
authors: M
authors: M
authors: Azizzadeh
mesh_terms: D000818:Animals; D001699:Biometry; D002415:Cats / Q000033:anatomy & histology*; D003430:Cross-Sectional Studies; D005123:Eye / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D005260:Female; D016014:Linear Models; D008297:Male; D014463:Ultrasonography / Q000379:methods / Q000662:veterinary
keywords: Persian cats; brachycephaly; eyes; ultrasonographic biometry