Yes, LENSES is a Scrabble word!

Letter values in Scrabble US: L 1, E 1, N 1, S 1, E 1, S 1.

Is it a valid word?

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

a transparent optical device used to converge or diverge transmitted light and to form images
a transparent optical device used to converge or diverge transmitted light and to form images
genus of small erect or climbing herbs with pinnate leaves and small inconspicuous white flowers and small flattened pods: lentils
(metaphor) a channel through which something can be seen or understood
biconvex transparent body situated behind the iris in the eye; its role (along with the cornea) is to focuses light on the retina
electronic equipment that uses a magnetic or electric field in order to focus a beam of electrons

Also: lens system, genus lens, crystalline lens, lens of the eye, electron lens.