A class four student, Dhanush attended the call at his home at Maduranthakam near here when the mobile phone was getting charged on January 29 night, hospital authorities said.
No sooner had he attended the call, it exploded, resulting in severe burns to his right hand, face and eyes.
The parents took the boy to the Chengalpattu Government Hospital and later to Government Kilpauk Medical College Hospital for treating his burn injuries.
Subsequently, he was admitted to the Government Ophthalmic Hospital here. While the right eye's cornea was damaged, the globe of the left eye was ruptured.
"The intensity of the blast not only damaged his right cornea it also ruptured the globe of his left eye, the right hand that was used by the boy to hold the phone suffered serious burns," Director, Regional Institute of Ophthmaology and Government Ophthamic Hospital, Dr Waheeda Nazir told PTI.
She said a patch was grafted from a cadaver donor cornea on the boy's right eye and the left eye was sutured to shape up the globe.
The boy's vision on his left eye now extends between four to five metres and as regards right eye, she said there are "more (procedures) to be carried out, we can comment on it only later.
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