Unless the eye seems inflamed, cloudy or it is popping out a bit it is common usually in older hamsters and isn't much to worry about. I have had hamsters that start getting it at 1 to 1.5 years of age and other didn't until they were over two. Every ham is different.

If Honey seems to be having problems cleaning his eye then you can take a warm damp cloth and wet the eye until the eyelids come apart easily, they will clean the rest.