Wash the chopping board and chopping knife before cutting cucumber. You can cut it into slices and then put them in the refrigerator to chill them. Usually 15 minutes will be OK. And then, you need to take 2 pieces of cucumber slices and put them on your closed eyes for about 15 minutes. You can take off the slices when they get warm. The coolness can calm down your irritated eyes. Hope this helped!
You can apply cucumber slices on your closed eyes. This can help reduce your red and puffy eyes. Besides, I heard that chilled cucumber juice can help with red and puffy eyes too. Cucumbers can absorb the fluid from your skin and reduce the swelling.
There are many home remedies for red and puffy eyes. Some of them work as the same mechanism as the cucumbers do. You can have a look at How to get rid of puffy eyes from an allergic reaction? Good luck!