Optic nerve regenerator
From The Stargate Omnipedia
Medical technology developed by the Bedrosians, capable of rapidly healing the optic nerve and restoring the sight of a blinded patient. It is compact, like a pen, and is discharges a pulse of energy -- directed at the affected eye from several feet away. Pain is felt while the nerve in the eye regenerates.
Several sessions are required to fully regenerate the optic nerves of a Jaffa, and likely several more for the average human.
New Ground - Nyan brings an optic nerve regenerator to Teal'c in the hopes of restoring his sight.