Yes, ACUITIES is a Scrabble word!

Letter values in Scrabble US: A 1, C 3, U 1, I 1, T 1, I 1, E 1, S 1.

Is it a valid word?

ACUITIES is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart)
a quick and penetrating intelligence

Also: visual acuity, sharp-sightedness.