the world > physical sensation > sight and vision > optical instruments > instruments for protecting the sight > [noun] > shade (4)
Something worn or used to shield the eyes from bright light.
A visor or covering worn to protect the eyes from bright light; cf. shade, n. 11e. rare.
Something which affords protection from light, heat, etc. A covering worn to protect the eye from light (see quot. 1857). Also plural, sunglasses…
A shade for the eyes. rare.