TIO is a tertiary level eye care centre and the hub of examination and treatment for general eye problems to more complicated eye diseases where high quality eye care is provided through various sub-specialty services. It has more than ten sub-specialty services, namely:
Oculoplasty and Lacrimal
Low vision and contact lens.
It has a secondary level community-based eye hospital in Hetauda. It also delivers eye care services through its network of 17 District Community Eye Centers and Surgical Centers
Since its establishment, TIO has examined and treated more than 6 million eye patients while more than 400,000 cataract and other major eye surgeries have been performed.