Evaluation of Schirmer tear test-1 and intraocular pressure in apparently healthy cattle

The objective of the study was to evaluate Schirmer tear test-1 and record intraocular pressure in apparently healthy cattle. The study was conducted in a cow shelter (Gaushala) located at Jodhpur, Rajasthan. Apparently healthy cattle (n=100) aged more than one year were randomly selected for ocular examination. All ophthalmic examinations were conducted by the same examiner to avoid inter-observer variability. A total of 200 eyes of 100 apparently healthy cattle of indigenous mix breed cows with a median age of 4.5 yr were examined. Out of 100 cattle, 67 were female and 37 were male. The mean Schirmer tear test (STT) values for the right and left eyes were 20.16±0.44 and 20.12±0.45 mm/min, respectively (range 12–33 mm), and there was no significant difference in S TT values of both eyes. The mean intraocular pressure values for right and left eyes were 11.07±0.24 (range 7–19) and 11.17±0.24 (range 7–18) mmHg, respectively, with no significant difference between right and left eyes. This study provided reference data for tear production and IOP measurements in apparently healthy cattle, which would help as reference values in any further studies and diagnosis of eye affections.