Diurnal variations of central corneal thickness and intraocular pressure in dogs from 8:00 am to 8:00 pm |
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| Authors: | Eva Martín-Suárez Carolina Molleda Rodrigo Tardón Alba Galán José Gallardo José Molleda |
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| Affiliation: | Animal Medicine and Surgery, Córdoba University, Campus Universtario de Rabanales Crt Madrid-Cádiz km 396 Córdoba, Córdoba 14014, Spain (Martín-Suárez, Molleda C, Galán, Molleda J); Clincal Sciences, Concepción University, Concepción, Chile (Tardón); Ophthalmology Service, Reina Sofía Hospital, Córdoba, Spain (Gallardo). |
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| Abstract: | Diurnal variations in central corneal thickness (CCT) and intraocular pressure (IOP) and their relationships were studied in healthy dogs. Central corneal thickness was measured by ultrasonic pachymetry and IOP by applanation tonometry in 16 beagle dogs. Measurements were taken every 90 min over 12 h (08:00 am to 08:00 pm). The mean CCT and IOP values obtained during the sampling period were 545.6 ± 21.7 μm (range: 471 to 595 μm) and 15 ± 2.2 mmHg (range: 10 to 19 mmHg), respectively. The CCT and IOP showed statistically significant decreases at 6:30 pm and 5:00 pm, respectively (P < 0.001). Central corneal thickness and IOP values were lower in the afternoon/evening than in the morning and were positively correlated. Both findings are important for the diagnostic interpretation of IOP values in dogs. |
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