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Anterior segment parameters in normal dogs using the Pentacam ® HR Scheimpflug system
Author(s) -
Wolfel Allison E.,
Pederson Samantha L.,
Cleymaet Allison M.,
Hess Ann M.,
Freeman Kate S.
Publication year - 2019
Publication title -
veterinary ophthalmology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.594
H-Index - 50
eISSN - 1463-5224
pISSN - 1463-5216
DOI - 10.1111/vop.12642
Subject(s) - scheimpflug principle , ophthalmology , medicine , keratometer , anterior chamber angle , corneal topography , cornea , astigmatism , anterior eye segment , anatomy , intraocular pressure , optics , physics
Objective To describe and compare normative anterior segment parameters between canine age groups using the Pentacam ® HR Scheimpflug camera (Pentacam). Animals Studied Thirty‐six sedated dogs (60 eyes) of varying ages and breeds were imaged with the Pentacam; only nondiseased anterior segments were included. Procedures Dogs were divided into three age groups: Group 1 (1‐5 years), Group 2 (6‐10 years), and Group 3 (11‐15 years). Values assessed included central corneal thickness (CCT), anterior and posterior corneal elevation (ACE/PCE), anterior and posterior corneal curvature metrics, corneal volume (CV), anterior and posterior corneal astigmatism (AA/PA), anterior chamber depth (ACD), anterior chamber volume (ACV), and anterior chamber angle (ACA). Tukey‐adjusted pairwise comparisons were performed. Results Overall CCT (mean ± SD) was 631.07 ± 59.91 µm. Central corneal thickness was 608.60 ± 48.63 µm for Group 1, 648.57 ± 51.06 µm for Group 2, and 635.37 ± 73.71 µm for Group 3. Anterior corneal elevation (ACE) measured 9.08 ± 0.58 mm, PCE measured 8.04 ± 0.50 mm, and CV was 58.13 ± 5.39 mm 3 . Astigmatism values were 1.34 ± 0.94 D for AA and 0.46 ± 0.44 D for PA. Anterior chamber values were 3.76 ± 0.56 mm for ACD, 383.68 ± 66.24 mm 3 for ACV, and 23.62 ± 29.33˚ for ACA. Significant differences were found between Groups 1 and 2 for CV (55.08 ± 4.08 mm 3 and 60.32 ± 4.19 mm 3 , respectively), ( P = 0.02). Conclusions Corneal volume significantly increased between Group 1 and Group 2. Central corneal thickness increased from Group 1 to Group 3, but was not significant with the current sample size. There were no other differences between age groups.