For the purposes of future searches of this thread, there has been a mistake in original guidance offered earlier. Below is corrected information and a link to the revised advice.
The guide wrongly stated that you need to have problems with both vision and hearing in order to score points for the ‘Other people communicating with you’ activity– it should have said that if you have problems with either you may score points. There’s more information on this page: www.benefitsandwork.co.uk/esa-error
Thanks to benefitsandwork for contacting me with the corrected information.