"Simple"
Ryu pushed all other thoughts out of his mind, rushing to heal himself. At the same time, he set part of his clones to focus on finding quicker solutions to all of this.
Luckily, he ended up finding one.
The best sort of method he could use to heal himself was, obviously, his Body Realm Cultivation Method. After all, it was built on the foundation of his Natural Treasures to begin with.
'There's no need for a new technique. I can use the excess Dark Seed qi to temper my body and turn the qi itself into more normal injuries. By then, it'll be easier for my Embryonic Qi to heal it, albeit only by a small bit.'
This process would speed things up by about 50% or so, but considering the damage he was already suffering, he would be hard-pressed to finish up in a short time regardless.
Luckily, his eyes had already recovered quite swiftly in just a few hours.