VM do offer an Accessibility Remote. It's white with black buttons and is designed with partially sighted customers in mind. The buttons are different shapes to differentiate them and have a raised button on the number 5 to best locate the number buttons.
There are also some changes that you can make to the screen itself to make it easier for him to navigate: If he has difficulty seeing his screen, both the V6 and TiVo has 'audio cues' which can help him find your way around his menus. These are sounds that show actions and reactions to button presses on the remote control.
There's a dedicatedHelp page which explains the remote and buttons
You can use the contact methods on the bottom of that page to order one, or wait a day or two and a member of the Forum Team will pick this up for you.
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