blear (adj.) Look up blear at Dictionary.com
c.1300, blere "watery, rheumy," perhaps related to blur. Compare Middle High German blerre "having blurred vision."
blear (v.) Look up blear at Dictionary.com
"to dim (of vision); to have watery or rheumy eyes," early 14c., of uncertain origin, possibly from an Old English *blerian, from the same source as blear (adj.). Related: Bleared; blearing.