Ian was 44 in 1983 during The Keep movie. Jeez
so I guess Ian was 44 years old in 1983 when he was doing The Keep movie.
Damn, that's a rough look for 44 years old lol. Even Scott Glenn looked rough for his age back then
https://www.ptsnob.com/2015/01/the-keep.html
If the close up is not a result of heavy softener, he looks actually fine to me. Doesn't look much off compared to Sutherland in Body Snatchers, in which Sutherland was 42/43 during filming.