THE PHENOL RED THREAD TEAR TEST A CROSS-CULTURAL STUDY

Randall Sakamoto

Abstract

A cross-cultural study measuring tear volume was performed using the Phenol Red Thread (PRT) Tear Test. The PRT Tear Test is a new test consisting of a special cotton thread impregnated with Phenol Red. Placed on the lower lateral lid margin, measurement of existing tears takes only 15 seconds per eye. This test represents a valid alternative to the traditional Schirmer test. There is little to no subjective sensation by the patient. It has been found especially helpful in detecting dry eye and marginal dry eye conditions. Two groups of 500 controlled normal non-contact lens wearing subjects from the United States and Japan were investigated. The mean tear volume for the United States was 23.9mm with a standard deviation of 9.5mm. The mean for Japan was 18.8mm with a standard deviation of 8.6mm. There was a significant difference between the two countries (pPROGRESSIVE HYPEROPIA IN A POST R-K PATIENT EXHIBITING INTER-INCISION VACUOLES

Details

Year: 1992

Program Number: Poster 12

Author Affiliation: n/a

Co-Authors: Edward Bennett, Vinita Henry, Sonja Paragina, Tomoko Narumi, [6+authors]Yoko Izumi

Co-Author Affiliation: n/a

Room: Great Hall