See the -output option in the Pod::Usage docs:

-output

    A reference to a filehandle, or the pathname of a file to 
which the usage message should be written. The default is 
\*STDERR unless the exit value is less than 2 (in which case 
the default is \*STDOUT).
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Sending the data to STDOUT will allow it to go to the pager. Alternatively, you can redirect STDERR in your shell. E.g. in bash:

your_program.pl 2>&1 | less
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