User blog comment:Madman97/The Primordial Theory/@comment-188.223.223.40-20130817205241/@comment-14027812-20130817205651

Well,Dexion Evicus in Dawnguard was able to speak and retain his sight for a short time after he read three of them,and he didn't lost his ability to speak,so...

Also,The Dragonborn read a Elder Scroll and did not suffer any ailments,probably due to he doing it in the rigt spot in the right time.