[ He lets Horus fade away as soon as the spell is finished being cast, with no point of keeping it around and continuing to blind them. ]

That's why I called it a bandaid. Masking the problem without fixing it. I don't think it's poison, or else I could try curing that... so this is the best I can do for now. Anything you buy on the shelves would be the same, probably. Taking the pain away three times a day or whatever the dosing schedule is.