title: Rectification of width and area of the ciliary cleft in dogs.
abstract: The width and area of the ciliary cleft (CCW and CCA) according to ultrasound biomicroscopy was rectified to compare dogs of different body sizes/weights, including toy breed (TBG), small breed (SBG), medium breed (MBG) and large/giant breed groups (LGBG). A linear correlation was detected between the natural log of body weight and the ocular axial length (OAL) reflecting the ocular size (OS; r=0.81, p<0.001). A significant positive correlation was found between OAL and the distance of the Schwalbe's line to the anterior lenticular capsule (SLD; r=0.87, p<0.001), suggesting that SLD could rectify canine OS. Rectified CCW (r-CCW) and CCA (r-CCA) were calculated using SLD and fixed SLD as the SLD mean (SLDM). The SLDM was 2.55 mm in this study, and r-CCW and r-CCA were calculated as r-CCW = CCW x (2.55/SLD) and r-CCA = CCA x (2.55/SLD)(2). The CCW values of TBG, SBG and MBG were narrower than those of LGBG (p<0.05). There were significant statistical differences in CCA between all groups other than TBG and SBG (p<0.05). There were no significant differences in r-CCW and r-CCA in any of the groups. In addition, CCW/SLD did not show significant changes in dogs with different body sizes/weights. These results suggested that r-CCW, r-CCA and CCW/SLD can be used for comparison between dogs of different body sizes/weights.
authors.affiliation: Laboratory of Advanced Diagnosis and Treatment, Department of Advanced Clinical Medicine, Course of Veterinary Science, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano, Japan.
authors.forename: Manabu
authors.initials: M
authors.lastname: Kawata
authors.forename: Hisae
authors.initials: H
authors.lastname: Tsukizawa
authors.forename: Masanari
authors.initials: M
authors.lastname: Nakayama
authors.forename: Takashi
authors.initials: T
authors.lastname: Hasegawa
mesh_terms: D000818:Animals; D000867:Anterior Chamber / Q000033:anatomy & histology; D049628:Body Size; D001835:Body Weight; D003315:Cornea / Q000033:anatomy & histology; D003886:Descemet Membrane / Q000033:anatomy & histology; D004285:Dogs / Q000033:anatomy & histology*; D005123:Eye / Q000033:anatomy & histology* / Q000166:cytology*; D007908:Lens, Crystalline / Q000033:anatomy & histology; D012590:Sclera / Q000033:anatomy & histology