The character has been trained to shield themselves from the most dangerous effects of reading Elder Scrolls, though this also tempers the knowledge they gain from doing so.
When reading an Elder Scroll the character may choose to utilize their training to protect themselves from its worst effects. They still make the usual Willpower test, but with no penalty. On success nothing happens and on failure they gain the Blinded condition for 1d8 days. As usual they make an Intelligence test to interpret and retain knowledge from the Scroll, but the techniques used to protect the character mean that this step can take days of meditation to complete (the specifics of which are left to the GM).