Hello Lucastuck.  Welcome.  Have you any reason to think that your uncle will not want to see you or are you just worrying "in case".  I should go and see him; he may like to see you but  you won't know if  you don't try; whereas you will possibly regret not having gone if you don't do it.  This is a critical time for your uncle; let him see that you want to see him.  Never mind how he looks; we may all come to look like that eventually but would still want to see family members.

I don't mean to sound harsh as I understand it is a worry for you and you probably are not very used to dealing with end-of life situations but I think it would be a good thing for all concerned if you go to see your uncle.  Do let us know what you have done and what you are feeling.  The decision is of course yours.  Best wishes.  Annie