Whenever someone is very close to God and have been doing good deeds and contributing to others in one's life time he will be rewarded with the best solution for any problem that he might have.
In this case, he was given the best treatment at one of the best medical centre for free which others would have paid RM 11,000 for both eyes. As he was an ex-deputy headmaster of a school, I am sure he has sown many seeds of success in other people's children. In addition, apart from his good contribution to mankind, he is also an obedient servant of Allah and spent his time learning the holy books,
In a nutshell, what you sow is what you reap, if you help someone with the intention of pleasing Allah, someone else will help you when you are in need.