Jesus heals a blind man as he approaches Jericho. These verses give background information and information about the setting of the story. (See: [[rc://en/ta/man/translate/writing-background]])
"there was a blind man sitting." Here "certain" means only that the man is an important new participant to the story but Luke does not mention his name. He is a new participant in the story. (See: [[rc://en/ta/man/translate/writing-participants]])