The Use of Smart Glasses for Saphenous Nerve Adductor Canal Block

Inclusion Criteria: * patients 18 years or greater * undergoing total knee arthroplasty Exclusion Criteria: * Patients with local infection at nerve block site * BMI \>40 * Patients who are at risk for local anesthesia systemic toxicity due to intraoperative local dose * Patients with nerve damage to the femoral or saphenous nerve * Documented history of mental or cognitive disabilities in EMR * Non-English speaking patient * Pregnant Women (self-reported) * Prisoners * Patients under the age of 18