Lu et al. (2000)

In this study 17 monkeys were exposed to 1.25 GHz high peak power microwaves, delivered anteriorly to the face at either 0, 4.3, 8.4, or 20.2 W/kg retinal SARs. The animals were exposed for 4 hours per day, 3 days per week for 3 weeks.

No evidence of retinal degenerative changes was seen. The authors concluded that retinal injury is very unlikely at 4 W/kg, and that functional changes that occur at higher SARs are probably reversible. They comment that their results differ from the observations by Kues et al. (1992), and postulate that the fluorophotometric procedure and repetitive use of ketamine in Kues' study may have predisposed the monkeys to retinal injuries.

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