Application of OSA-VET and qualiquantitative tear tests in brachycephalic dogs with and without keratoconjunctivitis sicca.

The aim was to compare the outcomes acquired from the OSA-Vet device with conventional quantitative and qualitative tear tests and between groups within each test, in brachycephalic dogs both healthy and those diagnosed with keratoconjunctivitis sicca. The dogs were divided into four groups: healthy dogs (HD), with mild KCS (MIKCS); moderate KCS (MOKCS); severe KCS (SKCS). All patients underwent ocular surface diagnostic examination in the following order, with a 10-minute interval between tests: non-invasive tear film breakup time (TBUTNI - OSA-Vet), tear meniscus height (TMH-OSA-Vet), meniscometry (I-Tear test), Schirmer Tear Test-1 (STT-1), and tear film breakup time (TBUT).

Assessment of tear film osmolarity using the IPen Vet osmometer in Pug and Shih-Tzu dogs with and without keratoconjunctivitis sicca.

Objective: To establish tear film osmolarity (TFO) values in Pugs and Shih-Tzus, with and without keratoconjunctivitis sicca (KCS).

Animals Studied: A total of 82 adult dogs were evaluated.

Procedure: The inclusion criteria for the healthy group was a Schirmer tear test (STT-1) ≥15 mm/min with no clinical signs of KCS, whereas those with KCS had clinical signs and a STT-1 ≤10 mm/min.