Lacrimal function test and intra-ocular pressure examination was conducted on 24 clinically normal eyes of twelve male buffalo calves, under the influence of regional nerve blocks (auriculopalpebral-group I and retrobulbar-group II). Rate of tear secretion in (It ml/minute) recorded by Modified Schirmer test after administration of nerve blocks revealed a significant decrease in values in both the groups (10.60±0.1l and 9.22±0.21, respectively). lOP readings recorded by a Schiotz tonometer showed a gradual non significant increase in the values of group I throughout the observation period. Animals of group II showed a non-significant increase in the values of lOP at 0,5,10 and 40 minute interval. The values at 15 minutes (I5.68±0.22) were statistically significant (P < 0.05) and highly significant (P < 0.01) at 20 minutes (15.87±0.22) and 30 minutes (15.96±0.22) intervals. In comparison to auriculo-palpebral nerve block, retro-bulbar nerve block decreased the lacrimal secretion and increased lOP significantly.
Lacrimal, lOP, nerve, block, Schirmertest
