Haplous!
“Haplous” is the Greek word that you see in Matthew 6:22
The eye is the lamp of the body. If your eyes are [HAPLOUS], your whole body will be full of light.
I did a whole podcast episode on this on Stevie Asks Too Many Questions, which is a podcast where I ask a question about scripture and then share some of the possible answers I found, all in 15ish minutes. If that sounds interesting - go here to find it wherever you listen to podcasts