A woman has been blinded in one eye after being tasered by a police officer who was a highly experienced Taser trainer.

Sheila Oakley, 36, was tasered in the eye by the officer at her home on Jacaranda Avenue at Woodridge, south of Brisbane, around 1:00pm (AEST) yesterday.

Her family says Ms Oakley became upset after a visit by social workers.

"I don't think there's a chance for me to get my vision back on my left-hand side," Ms Oakley.

Ms Oakley was intoxicated and admits she held a stick when police arrived.

"I put the stick down and as I was going in to get my bag, he pointed the Taser at me and got me," she said.

Her sister, who did not want to be named, says a steel prong carrying a high voltage electrical current hit Ms Oakley's eye.

"When she went to grab her handbag he tasered her and then the Taser went straight into her eye," she said.

She says with the Taser still lodged in her eye, the officers continued to arrest her.

"Four police officers then got her, threw her to the ground, turned her onto her stomach, put their knees into her back, and then put handcuffs on," she said.

She says Ms Oakley was held at the house for more than 30 minutes before ambulance officers took her to the hospital.

Her sister says after it happened, the officer apologised to Ms Oakley.

"The police officer came to the ambulance to speak to Sheila and said to Sheila, 'I know you don't want to speak to me right now, but I am sorry'," she said.

Investigation underway, commissioner says officer acted in self-defence

Police Ethical Standards Command and the Department of Child Safety are investigating the incident.

Acting assistant police commissioner Steve Hollands says the woman had been threatening the officer with a table leg that had nails protruding from it.

"The police officer involved is a very experienced police officer," he said. "He's a senior constable and he's also a qualified Taser instructor.

"The ethical standards command and the criminal investigation commission will overview the matter and at this point in time the woman remains in hospital in South Brisbane."

Acting Assistant Commissioner Hollands says the officer acted in self-defence.

"In the absence of Tasers, the police officer would have been justified in using his firearm under the circumstances," he said.

"The injury to the female of course is very much regrettable and the QPS is providing all reasonable assistance to the family and members of her family."

Queensland Police Minister Jack Dempsey has declined to comment on the matter as it is subject to an internal investigation. The Queensland Police Union has also declined to comment.

Ms Oakley's family say they will be suing the Queensland Police Service.

Family spokesman and community leader Abraham Saylor believes the incident is "absolutely appalling".

"From what I've been told about police tasering people you are not supposed to taser from the head up," he said.

"She lives alone and people rock up to her house, she would have a bit of a fear factor there."