Pakistan’s jailed former prime minister Imran Khan on Tuesday was taken from jail to a hospital for treatment of an eye ailment and later shifted back to jail, officials said. Khan was diagnosed last month with right central retinal vein occlusion (CRVO) affecting his vision.

On Tuesday, he was brought to the Pakistan Institute of Medical Sciences for a second round of treatment. He had received treatment earlier on January 24. Prior to the procedure, he was examined by a board of specialist doctors.