Analysis Of Tear Chemistry Testing.

Initially, the phenol red test was to be compared to the Schirmer I test. However, the phenol solution is not approved in the United States for use in the eye. Alternatively, the various forms of the Schirmer Tear Test were analyzed to determine whether or not anesthetic is needed for reliable results. Three conclusions were made. First, the Schirmer strips can be used with or without anesthetic. Second, the Schirmer recommended test time may be much longer than necessary. Third, the Schirmer test is not always a good indicator of dry
eye candidates.