Veterinary ophthalmology · 2025
Central Corneal Thickness and Intraocular Pressure Increases With Age in Normal Holstein Cattle.
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Kibar Kurt Büşra, Gülendağ Erman
Аннотация
OBJECTIVE: To establish the central corneal thickness (CCT) and intraocular pressure (IOP) of normal Holstein cattle and any relationship with age.
METHODS: Age of 50 Holstein cattle was recorded in days. CCT was measured by ultrasonic pachymetry, and IOP values were recorded by rebound tonometry from a total of 100 eyes. CCT and IOP values were subsequently analyzed in relation to age. The animals were divided into the following two groups: calves (< 360 days old) and adults (≥ 360 days old).
RESULTS: Mean CCT value of all animals was 723.1 ± 75.9 μm in the right eye, 714.5 ± 82.2 μm in the left eye. Mean IOP value of 100 eyes was 25.4 ± 8.07 mm/Hg in the right eye, 24 ± 7.89 mm/Hg in the left eye. Mean CCT and IOP values of the animals < 360 days old were 697.7 ± 8.28 μm and 21.6 ± 0.77 mm/Hg respectively. Mean CCT and IOP values of the animals ≥ 360 days old were 768.1 ± 14.4 μm and 31.9 ± 1.18 mm/Hg, respectively. A statistically significant difference was observed between the groups in terms of CCT and IOP values (p < 0.001). A positive correlation was identified between CCT and age (r = 0.57, p < 0.001) and between IOP and age (r = 0.488, p < 0.001).
CONCLUSIONS: This study documents the age-related increase in both CCT and IOP values in cattle.
METHODS: Age of 50 Holstein cattle was recorded in days. CCT was measured by ultrasonic pachymetry, and IOP values were recorded by rebound tonometry from a total of 100 eyes. CCT and IOP values were subsequently analyzed in relation to age. The animals were divided into the following two groups: calves (< 360 days old) and adults (≥ 360 days old).
RESULTS: Mean CCT value of all animals was 723.1 ± 75.9 μm in the right eye, 714.5 ± 82.2 μm in the left eye. Mean IOP value of 100 eyes was 25.4 ± 8.07 mm/Hg in the right eye, 24 ± 7.89 mm/Hg in the left eye. Mean CCT and IOP values of the animals < 360 days old were 697.7 ± 8.28 μm and 21.6 ± 0.77 mm/Hg respectively. Mean CCT and IOP values of the animals ≥ 360 days old were 768.1 ± 14.4 μm and 31.9 ± 1.18 mm/Hg, respectively. A statistically significant difference was observed between the groups in terms of CCT and IOP values (p < 0.001). A positive correlation was identified between CCT and age (r = 0.57, p < 0.001) and between IOP and age (r = 0.488, p < 0.001).
CONCLUSIONS: This study documents the age-related increase in both CCT and IOP values in cattle.