Blear \Blear\, a. [See Blear, v.]

1. Dim or sore with water or rheum; -- said of the eyes.

His blear eyes ran in gutters to his chin. --Dryden.

2. Causing or caused by dimness of sight; dim.

Power to cheat the eye with blear illusion. --Milton.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Blear \Blear\, v. t. [imp. & p. p. Bleared; p. pr. & vb. n. Blearing.]

[OE. bleren; cf. Dan. plire to blink, Sw. plira to twinkle, wink, LG. plieren; perh. from the same root as E. blink. See Blink, and cf. Blur.]

To make somewhat sore or watery, as the eyes; to dim, or blur, as the sight. Figuratively: To obscure (mental or moral perception); to blind; to hoodwink.

That tickling rheums Should ever tease the lungs and blear the sight. --Cowper.

To blear the eye of, to deceive; to impose upon. [Obs.]

--Chaucer.

Source: Webster's Revised Unabridged Dictionary (1913)