On the Direct Gov wbsite on thPension Credit part it states
Applying for Pension Credit
The Pension Credit calculator gives you an estimate of how much Pension Credit you may get. It is not an application for Pension Credit. If you decide to apply for Pension Credit, see 'Pension Credit - introduction'.
If you or your partner is registered blind you should call 0800 991 234 to find out if you might be entitled to Pension Credit.
my question, if anyone can answere is
what difference does it make to a Pension Credit claim if the applicant is Blind ?