"He can't see anything in either of his eyes. He only feels sorts of light in the left eye, but that does not mean he can see anything," Nawab Ali, Siddiqur's brother who accompanied him to Chennai, told bdnews24.com on return.
He came back from Chennai on a Maldivian Airlines flight which landed at the Shahjalal International Airport Friday afternoon.
A departmental investigation by police found 'ineptness' of their members caused the injury.
At the airport, Siddiqur told journalists that he would like to continue his studies.
"I don't want to be a subject of neglect by anyone," he said. His eyes were covered by dark sunglasses while as he spoke to reporters.
As a show of protest to the police brutality and solidarity with Siddiqur, a group of Titumir College students got themselves blindfolded when they received their friend at the airport.
"Our friend Siddiqur will never see the light of this world again. We are trying to feel his pain by covering our eyes with black clothes," Shah Ali, a friend of Siddiqur, told bdnews24.com.
Dr Jahidul Ahsan, an assistant professor at the National Institute of Opthalmology and Hospital, was also with Siddiqur during his treatment in India.