It's O.K., it's perfectly normal to worry, we all do at times.
This is a good place to come for advice since there are long time owners here that have seen + dealt with many situations. Some of us have owed + raised dragons for over 20 years,
BTW, is the black color you are concerned with surrounding the eye ? And the other eye has an orange surrounding ? Because that would probably be due to shedding + rubbing it .....is there anything in his tank that could leave stains if he constanly rubbed his face there ?
Andif he has any infection or wound you can treat it with raw, unpasteurized honey [ like from a health store or direct from a beekeeper ] Raw honey is a very powerful antimicrobial and can be use on any type of wound, even directly in the eye. I used it for my own dragon's eye infection about 5-6 years ago. Just mix a tiny bit of warm water with the honey so it's easier to apply, then use a Q-tip or an eyedropper. When using honey, be sure there are no loose insects in the tank and no loose substrate to stick to it.