Strong's #573: haplous (pronounced hap-looce')

probably from 1 (as a particle of union) and the base of 4120; properly, folded together, i.e. single (figuratively, clear):--single.

Thayer's Greek Lexicon:

̔͂

haplous

1) simple, single

2) whole

3) good fulfilling its office, sound

3a) of the eye

Part of Speech: adjective

Relation: probably from G1 (as a particle of union) and the base of G4120

Citing in TDNT: 1:386, 65

Usage:

This word is used 2 times:

 

Matthew 6:22: "thine eye be single, thy whole body shall be"
Luke 11:34: "thine eye is single, thy whole body also"