Technology-Based Eye Care Services (TECS) is a tele-ophthalmology program operating in the Veterans' Administration since 2015. This study explores characteristics of the national TECS population, evaluates implementation and sustainability of TECS, and analyzes possible associations and effects of demographic characteristics and social determinants of health (SDOH) on being diagnosed with a vision threatening (VT) disease. Implementation and sustainability of TECS from 2015-2022 was examined along with the sociodemographic characteristics of Veterans served through TECS in 2021. Veteran patients seen in TECS nationwide. Characteristics, disease prevalence and diagnoses, implementation success rate, sustainability rate, preliminary analysis of outcomes and disparity. Per quarter from 2015-2022, TECS sites were classified as implementing, active, or sustained. Standard Query Language (SQL) was used to determine sociodemographic data and logistic regression models were used to identify risk factors associated with VT eye diagnosis. 21,712 Veterans, 52.1% rural or highly rural, were served by TECS in 2021. The average age was 64.7 years, with females comprising 10.9% of the population served. From 2015-2022, of the 67 TECS sites initiated, 6 were implementing with 51 of 61 initiated sites still operational in the first quarter (Q1) of 2022 (83.6% success rate).Macular degeneration (AMD) and cataracts were more prevalent in rural and highly rural populations (7.6% and 11.3%, and 48.8% and 55.0%, respectively) vs. urban populations; glaucoma and diabetic retinopathy (DR) had the opposite association. The prevalence of any type of VT eye disease was lowest in the Mountains/Central region (0.54%) and highest in the Southeast region (3.2%) of the US. Rural and highly rural residents were 1.3 and 2.5 times as likely, respectively, to be diagnosed with a VT eye disease than urban residents. Implementation and sustainability of TECS has been promising. The data provides key information that can be utilized to improve the deployment of TECS and similar programs, along with the possible future direction of TECS services. Moreover, experience from one national ocular telehealth program clearly illustrates that telemedicine can address eye care disparities in the Veteran population and may be utilized for other vulnerable groups as well.