That is, at a very young age, the limiting factor on reading for many could be inability to focus close up rather than insufficient brain development.
After a few years, near vision is said to improve from the baseline, and so perhaps people who are destined for myopia get a head start.
Some people have, with apparent success, put it into practice by teaching their kids to read using extremely large print in the beginning.
https://healthland.time.com/2012/05/07/why-up-to-90-of-asian...
https://edition.cnn.com/2015/04/05/asia/myopia-east-asia/ind...
The solution is to get children more sunlight hours for proper eye development.
https://www.researchgate.net/publication/319246387_Early_Rea...
The boy is clearly smart, it has to be seen whether he will be the most prolific mathematician the world has ever known (like Gauss).
Among geniuses, Mensa is for the morons, relatively speaking. It also has the highest annual fees.[1] It's all a machine, partner. Live free, don't join.
I have never sought membership. I want nothing to do with them.
That said. Myopia in children is concerning. He needs to be given sufficient time outdoors, focussing on things more distant to infinity.
Aside from that, Mensa is just a club, but so is Skull and Bones, as Geraldo found out. Clubs can be good or bad, it depends. Other british child prodigies are on record that their parents fully implemented Philip Larkin's "this be the verse" [0] and recommend a more normal childhood within the limits prodigy-hood permits.
https://www.poetryfoundation.org/poems/48419/this-be-the-ver...