NVM, read through the docs a little more closely. Solution:

sub anki_import {
  my $file = shift;
  opt verbose => (
    isa => 'Bool',
    alias => 'v',
    comment => 'provide details on progress of Anki::Import'
  );

  opt vverbose => (
    isa => 'Bool',
    alias => 'vv',
    comment => 'verbose information plus debug info'
  );

  my $args = optargs( @_ );

  if ($args->{verbose}) 
    ....
  }
}
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