Mine eye is consumed... — Comp. Psalms 6:7. It was an old idea that the eye could weep itself away. It is an actual fact that the disease glaucoma is very much influenced by mental emotions.
Belly. — Better, body — both mind and body were suffering.
Related Commentaries of Psalms 31:9
Psalms 31:9
9 Have mercy upon me, O LORD, for I am in trouble: mine eye is consumed with grief, yea, my soul and my belly.