As headset technology improved, the ear cups on those headsets got tighter and tighter to passively reduce noise. As those cups got tighter, pilots and other headset-wearers began noticing that the rigid frames of their sunglasses were doing two pretty unfortunate things:
‍
1.) Pressure from the clamping springs on the headset was creating leverage on those rigid temples, causing pain and discomfort for people who simply can't risk flying without UV protection for their eyes. (All of our lenses have 100% UV protection without using polarization - though you can choose polarized if you'd like.)
‍
2.) The gap formed between the cup and the wearer's head by the frames were allowing noise leaks that ruined the purpose of the tight-fitting cups. 

The founder of Flying Eyes tried many brands of sunglasses to find ones that were comfortable, effective at reducing noise leaks, and actually protected his eyes. Why was that so difficult? He figured if it didn't exist, he could make it exist, and - voila! - Flying Eyes Optics was born.