A Sight for Sore Eyes

Walkthrough
Ask Neloth in Tel Mithryn if he needs help with his research. He mentions that he needs a test subject for another spell. Allowing him to proceed will result in him casting a spell that blinds the Dragonborn, causing the screen to fade out.

He realizes the error and comments that writhing tentacles have appeared where the eyes once were. Talvas Fathryon, shocked by the results, comments that he is about to vomit. Eventually Neloth reverses the spell and sight is restored, thus completing the quest.