Just buy glasses in / from India. The Indian government price protects most prescriptions because otherwise the poor will be absolutely excluded from them. So too with eye glasses. I bought mine in 2005 for the equivalent of $20 & they are running perfectly fine even now. I bought another pair in 2016 for the equivalent of $55 & they are now my backup. Both prices are including frames. My prescription had changed very little.

And I already found an error in it. The Kannada script has evidence of it existed at least since 400 AD, but the website shows it as 1500 AD (?).

Additionally, the Vedic scripts would be much much older than what is depicted - circa 7,000 BC

> Additionally, the Vedic scripts would be much much older than what is depicted - circa 7,000 BC

That can’t be correct. The proto-Indo-European language has an upper bound at somewhere near 4,500BC if I recall correctly [0]

[0] https://press.princeton.edu/titles/8488.html

Where can I read more about the Vedic scripts?

I've successfully used lucidcharts.com to import, edit & re-export back to Visio.