He DOES have to wear custom glasses when he has the eye so he can stabilize the draconic vision and the normal vision or he'll get wicked headaches

these days due to mana consumption and some aether fuckery he has to give the eye back to hrae to take a break instead of using it 100% of the time but it's usually tied to his own downtime so hrae doesnt mind, and it gives them time to chat about kai's adventures