章 1297: Are You Suffering From Achromatopsia?

Out of habit, Zhang Xuan collected the manual of the Divine Eyes of the Ninth Netherworld into the Library of Heaven's Path before browsing through it. So, what he was reading wasn't the text in the sky but the compiled book in the Library of Heaven's Path.

The introduction still sounded fine, but when he began processing the formula to practicing the optic art, he swiftly realized that something was amiss with the technique.

"What's wrong?" Sage Kui asked.

The optic art was created by his teacher, and it was incomparably profound. There was no genius possessing the Eye of Insight who wouldn't be mesmerized by it. Yet, the young man actually frowned and said that there was a problem. What did he mean by this?

"This…" Zhang Xuan turned over to look at Sage Kui. "Elder, I would like to ask if there's anyone amidst the preceding sanctum heads who have suffered from blindness?"