It should be temporary , especially if a shed is coming , or the dragon has eaten.
If it persists , or worsens , I'd have a reptile vet take a good look , it may be symptomatic of a something wrong health wise. Swollen eye sockets can be indicative of several different health issues , some are life threatening .
My lovely big boy Puff had a swollen eye , turned out this was fluid pressure in the tissues and eyesocket due a large aneurism on his jugular.
Looking at your dragon , this may be just a aspect of the lighting in the photo, but it appears there may be some swelling in the area I've highlighted
Puff's problems started like that and over a period a several months the swelling on the back of his head became very pronounced and one of his eye's very distended. Keep a very close eye on this and deal with it earlier than I did , my vet misdiagnosed the swelling as an abscess and only discovered it was a very large aneurism when he opened it up and discovered it was full of blood and very hard to repair . Puff never survived recovery after his very big operation.
If it's an aneurism , treat it early before it gets lifethreatening , and make sure to harvest and store some of the dragon's blood before surgery as it'll need transfusions , find a very good reptile vet surgeon is my advise too. Doctor Tosney (?) in the USA might be able to direct you to one in your area who has experience with dragon aneurisms.
I'd be taking photos from the same angles above and to each side of the dragon's head at least weekly , this will help you pick up any changes ( increases is swelling, or other wise ) , if thing are happening faster , then perhaps daily or every other day.
This can very important information for the vet to work off and can give the vet some clues.