Run The vOICe web app by visiting https://seeingwithsound.github.io/webvoice/webvoice.htm
You can turn on the hemianopia simulator for use with a virtual reality headset using https://www.seeingwithsound.com/webvoice/webvoice.htm?hemianopiaL&vr (or use hemianopiaR for right hemifield hemianopia). Read https://seeingwithsound.github.io/webvoice/webvoice2.htm for more information.