A Novel Review of the Evidence Linking Myopia and High Intelligence (2015)

I recall westhunt.wordpress.com writing about this. Authors of The 10,00 Year Explosion, highly recommended and important book.

A correlate of IQ in humans is myopia, one idea being that IQ boosters relax early developmental constraints on CNS growth resulting in eyeballs too big for the socket, leading to myopia. I have read somewhere that myopia is positively related to income in the US. Time to try to find that literature.

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Here is another perspective. A prominent morphological correlate of IQ is myopia, caused by the eyeball being too big for the socket. Greg and I have suggested in our Ashkenazi paper that one route to higher IQ is to release constraints on early CNS development, for example by dinging BRCA1 and BRCA2. Larger sockets could simply be adaptations to bigger eyeballs arising from a “quick fix” that boosts very early CNS growth.