The Effects of mmW and THz Radiation on Dry Eyes: A Finite-Difference Time-Domain (FDTD) Computational Simulation Using XFdtd

Abstract

Overview

This study focuses on exploring the health implications of radiofrequency (RF) radiation on the cornea using computational simulations. With increasing concerns about the effects of mmW (millimeter wave) and THz (terahertz) radiation on eye health, particularly in the context of expanding 5G and prospective 6G technologies, this research is timely and significant.

Methodology

The Finite-Difference Time-Domain (FDTD) method, implemented via the XFdtd software, was utilized to simulate the absorption of electromagnetic waves by the cornea under various conditions. Factors such as tear film thickness and hydration levels were considered, given their crucial role in corneal health.

Findings

• Temperature increases in the cornea were analyzed as a measure of the heating effect induced by RF radiation.
• The study revealed that variations in the water ratio and tear film thickness significantly influence the RF absorption capabilities of the cornea, thereby affecting susceptibility to dry eye syndrome.
• Specific effects of radiation from 30 GHz to 0.5 THz were examined, presenting notable differences in power density and electric field distributions which correlate to higher risks in dry eye conditions.

Conclusion

The findings underscore the potential for mmW and THz radiation to have a more pronounced impact on dry eyes. These insights point to a crucial link between electromagnetic fields and ocular health, suggesting a heightened risk of adverse effects with advancing telecommunications technology. Additional in vivo studies are recommended to further elucidate these relationships.