Anas said that the Prophet ﷺ appointed Ibn Umm Maktum as substitute to lead the people in prayer, and he was blind.  

أَنَّ النَّبِيَّ ﷺ اسْتَخْلَفَ ابْنَ أُمِّ مَكْتُومٍ يَؤُمُّ النَّاسَ وَهُوَ أَعْمَى