I have impaired vision myself and I find HN to be one of the most accessible sites around. I have set all font sizes to 32-point and do not allow any smaller fonts. Also I have chosen a font that easy to read for me and do not allow sites to select any other fonts. On bad days I disable CSS so I can have my default bright-on-dark color scheme.
Using these settings, HN is a pleasure to read! Other sites suffer, of course, because large fonts destroy their layouts, but those sites are FUBAR (from an accessibility point of view) anyway.
Using these settings, HN is a pleasure to read! Other sites suffer, of course, because large fonts destroy their layouts, but those sites are FUBAR (from an accessibility point of view) anyway.