Layton Rahmatullah Benevolent Trust

Layton Rahmatullah Benevolent Trust or LRBT is Pakistan's largest non-governmental organisation, working to fight blindness in the country. It is assumed to be not only the largest eye provider in the country but also the largest institute in the world to have treated over 45 million patients in 35 years also crossing daily OPD of over 10,500 (avg daily) patients every single day. Established in 1984, it is based in Karachi with hospitals and primary eye care centres throughout the country.
Naming.
The Trust is named for its two founders: Graham Layton and Zaka Rahmatulla, both whom contributed Rs. 500,000/- each to start it.
History.
The trust was founded in 1984 with Rs. 500,000 apiece by Graham Layton, an Englishman who become a Pakistani citizen, and Zaka Rahmatulla. Upon his death, Layton left his estate for the benefit of LRBT.
Services provided.
The following services are provided at their hospitals: 
Network.
Currently (2020) there are 19 fully equipped hospitals and 58 primary eye care centers across Pakistan making 77 facilities nationwide . Any Pakistani is just 200kms away from LRBT facility wherever He/She is in Pakistan. .