The purpose of this study is to assess the clinical feasibility of DeviceFarm, Inc.'s RenewalNail™ system and the treatment protocol that was developed based on extensive laboratory testing on human cadaver nails. The Protocol calls for three 45-minute treatments performed over a week to achieve mycological cure. Mycological cure will be assessed with two consecutive mycological culture tests done over a week following the third treatment. Two consecutive negative mycology culture results confirm the elimination of fungus causing onychomycosis infection, as recommended by recent FDA guidance. There will be no placebo arm in the study. Clear nail growth will be documented and assessed by photography for 5 months after treatment.