“…When operating in the eye, the tremor frequency dropped to the 5-6 Hz range; this decrease in tremor frequency may possibly be due to the added mass of the trochar compared to air or even friction on the forceps from the trochars that allow entrance into the eye. Physiologic tremor may be influenced by numerous factors (Belykh et al, 2018;Fargen et al, 2016;Rui et al, 2018). Effects known to increase surgical hand tremor include caffeine (Humayun et al, 1997;Wharrad et al, 1985), fatigue, previous alcohol consumption, recent exercise, sleep deprivation, lack of experience, and fasting (Belykh et al, 2018;Fargen et al, 2016;Gizicki et al, 2017;Rui et al, 2018;Slack et al, 2008a).…”