Inclusion Criteria:  Aged 18-40 (either sex) Post-operative anterior cruciate ligament reconstruction (autograft), either bone-patellar tendon-bone graft or semitendinosus (hamstring) graft  Exclusion Criteria:  Patients with significant cognitive deficit (MEC<24). Patients with epilepsy or severe vision problems Pregnant patients Previous surgery on the reconstructed knee, excluding arthroscopy Previous anterior cruciate ligament reconstruction on either knee Sustained concurrent injury to the contralateral knee Concomitant collateral ligament and/or meniscal repair Presence of symptomatic tibiofemoral osteoarthritis