It's very normal. People always accidentally get a bit of cayenne pepper in their eyes when they are cooking or eating. Don't get scared, quickly rinse your eyes with water. A bit of pepper won't harm your eyes. After a while you will be getting better. Just please be careful next time.
Well, I have to say that it is terrible to have this kind of pepper into your eyes, and it will just make your eyes feel uncomfortable and hot, even burning. At this moment, first, you should have some pure water to wash your eyes carefully, and so that it can just wash pepper out. And then, if your eyes still feel burning, you can just take some cool tea bags or ice under your eyes. And just repeat it. It will relieve your symptom. Finally, some eye drops can be used too. In that way, it will just be fine. And just do it quickly, or it will just irritate your eyes, leading to further heavy problems.
It is no doubt that your eyes will feel burning when you get a bit of cayenne pepper in the eyes. You should use the water to wash the eyes as soon as possible. Then you may still feel burning at the eyes. You could find the hot water and clean cloth to do the warm compress. Your eyes will feel moisture and better. You could have a try.