Your eye is the lamp of the body (sōmatos | σώματος | gen sg neut). When your eye is sound, then your whole body (sōma | σῶμα | nom sg neut) is full of light, but when it is diseased, then your body (sōma | σῶμα | nom sg neut) is full of darkness.
Reference
Luke 11:34
Sequence
16