TABLE 1.

Different models of telemedicine and technological requirements

Technology modality	Definition	Technological requirements	Timing
Store and forward	Transfer of patient data (including images and tests)	No communication b/w patient and reviewing clinician. Requires ocular imaging equipment when patient attends	Asynchronous
Real time	Real time communication between patient and specialist at time of appointment with ocular imaging and tests	Stable video/audio conferencing requirement	Synchronous
Hybrid	Patient attends site for required tests prior to telehealth appointment with specialist at home or future time	Equipment for patient exam at site. Stable video/audio conferencing requirement	Asynchronous and Synchronous