Blear — Defs

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

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.

02 v. t. To make somewhat sore or watery, as the eyes; to dim, or blur, as the sight. Figuratively: To obscure (mental or moral perception); to blin…

imp. & p. p. Bleared; p. pr. & vb. n. Blearing

1.
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.

Phrases & compounds

To blear the eye of — to deceive; to impose upon.