Zinc in tears.
The tear and serum zinc (Zn) levels were determined simultaneously by atomic absorption spectrophotometry in 11 healthy subjects. The mean tear Zn level was found to be 1.537 +/- 0.146 (SEM) ppm while the mean serum Zn level was found to be 1.03 +/- 0.046 (SEM) ppm.
Adult↗