Abstract
We examined the precorneal film, the Schirmer test No. 1, and the break-up time tests in 440 healthy young students. There were no statistically significant differences (1) between men and women from the same origin who were brought up in the same environment, (2) between students from different ethnic origins who were brought up in the same environment, and (3) between students of the same origin who were brought up in different environments. Gradual seasonal changes in climatic factors, such as temperature, humidity, visibility, and barometric pressure, seem to have no appreciable effect on the Schirmer test No. 1 or break-up time test.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
