MedicineOphthalmologyVeterinary OphthalmologyClinical OptometryUltrasonographyUltrasoundCorneal PhysiologyIntraocular Pressure MeasurementCentral Corneal Thickness MeasurementCorneal Thickness Assessment
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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Diurnal variations in human corneal thickness.
C L Harper, Michael E. Boulton, David Bennett et al. · British Journal of Ophthalmology · 1996 · 223 citations · Full text
Diurnal Variation of Corneal Sensitivity and Thickness
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