Bajrangi was granted bail by the Gujarat High Court on April 23 for three months for the treatment of vision loss. It was then extended for another ten days.
"My father today returned to the jail, but he is blind now even after the treatment in Chennai," said his son Anil Patel.
"There is no improvement in his vision. He cannot see anything," Anil told PTI.
Bajrangi is one of the 31 convicts of Naroda Patiya case which relates to massacre of 97 Muslims in Naroda Patiya area here during the post-Godhra riots in 2002.
Also Read
The trial court sentenced him to "imprisonment till death" in August 2012.
The former VHP leader has been granted temporary bail by the HC six times on various grounds.