Yep
Unless you want the vaguely inexpensive Austin Powers/Librarian varieties you're stuck paying top whack for the designer ones. I got some that look a bit like Harry Hill's.
(theneet began to cut her hair and long for balls, Thu 18 Jun 2009, 13:00, archived)

The internet is cheaper than the high street opticians,
by quite a long way. I got mine for £90, extra thin lenses and all.
( Moon Girl Technologies horrendous beanbag, Thu 18 Jun 2009, 14:17, archived)