Abstract

Overview

The study revisits the impact of 35 and 94 GHz millimeter wave exposures on the eyes of non-human primates, specifically targeting the corneas of rhesus monkeys. Previous findings have shown variations and uncertainties in the corneal temperature increases during such exposures.

Improvements in Research

• Incorporation of enhanced models and dosimetry
• Correlation with a thermodynamic model predicting surface temperature rises

Findings

New data reveal that the safety thresholds previously reported for eye exposures are significantly under-evaluated, necessitating a revision of safety margins. Specifically, the minimal visible lesion thresholds should be increased to 10.6 ± 1.5 J/cm for 35 GHz and 7.1 ± 1.0 J/cm for 94 GHz at power densities below 6 W/cm when blinking is not possible. With an active blink response, a higher threshold of 20 W/cm is advisable, though prolonged exposure may result in eyelid burns.

Conclusion

This study provides crucial data and adjustments to previous models, enhancing our understanding of millimeter wave safety thresholds for ocular exposure, thus highlighting a significant health risk associated with electromagnetic fields if safety standards are not properly adhered to or updated.