Awami League president Sheikh Hasina's both ears were damaged, right ear severely, and her hearing aids became dysfunctional for not doing the checkup for a long time, her doctor in Orlando said.
Her personal aide, Dr Hassan Mahmud, quoting Dr Michael Billiowick, told the news agency from Toronto that she was examined for two hours at Orlando ENT Associates on Wednesday.
The doctor found both the ears of the ex-Prime Minister further
damaged due to the delay in checkup.
Dr Hasan said the hearing aid to her left ear was adjusted but that of the right ear remained "dysfunctional".
"It may take one month for reinstallation of the hearing aid in the right ear," Dr Michael was quoted as saying. He advised her regular checkup.
Hasina suffered serious ear injuries following grenade blasts at her rally at Bangabandhu Avenue on August 21, 2004.
The Awami League chief, who was recently set free from prison for overseas treatment, had also treatment for her teeth at an Orlando dental clinic.
She may stay with her daughter Putul for a week or so and move to London. Then she may return to Orlando in the United States for further checkup of her damaged ears.
Earlier, Hasina arrived at Toronto Airport Thursday at 9:45 am (BST) where she was received by her daughter Saima Wajed Putul and sister Sheik Rehana.
Son-in-law Mashrur Hossain, Toronto Awami League leader Sarwar Hossain, Bangladesh Deputy HC Masud Mahmud and Canadian government official Liz Hethering were present.