PRESIDENTIAL hopeful Hillary Clinton has ruled out taking a brain test during a TV interview about the elevated risk of dementia among older people.

The under-fire Democrat said 'there's no need for that' when she was being grilled about having a check by ABC anchor Sarina Fazan during an interview in Orlando.

3 Clinton is described as looking 'cock-eyed' in the video

3 The Democrat insists she is mentally strong enough to be President

The calls for a test came after a bizarre video was posted on the internet showing Clinton looking 'cock-eyed'. Doctors say eye problems can be an early sign of a degenerative disease.

Clinton, 68, at first joked when asked if she would take 'some neurocognitive test' given the elevated risks for degenerative disease because of her age.

"I'm very sorry I got pneumonia," laughed Clinton. "I'm very glad that antibiotics took care of it. And that's behind us now.

"I've met the standard that everybody running for president has met in terms of releasing information about my health."

When pressed by Fazan, who revealed her brother is a neurosurgeon who once operated on a member of her staff, Clinton stood fast.

"There's no need for that. The information is very clear. And the information, as I said, meets the standards that every other person running for president has ever had to meet – and I'm happy that we've met and even exceeded them in certain ways," she said.

RELATED STORIES CAN OF WORMS Lying about her health has backfired on Hillary Clinton and exposed her dismal judgement DOCTOR WHO? Woman snapped checking Hillary Clinton’s pulse is ‘her personal doc who is regularly forced to defend her health' ‘I’M NOT ILL!’ Hillary Clinton opens a jar of gherkins during TV interview in bizarre bid to prove her physical health 'I'M FIT FOR PRESIDENCY'! Donald Trump vows to release results of his medical exam to prove his 'superior' health ‘SLEEP WELL, HILLARY!’ Trump mocks Clinton’s illness and her 'day off to rest' before their first TV debate

And Clinton said her health puts that of her opponent Donald Trump's, 70, totally in the shade.

"I have to say, my opponent has not met that standard. So I am very happy that we have put out all the information that there is, that reflects on my health. And I am physically, mentally healthy and fit to be president of the United States," she declared.

Fears about Hillary's health were raised again earlier this week when it was pointed out her eyes were darting from side to side on a video posted by The American Mirror.

Blogger John Binder wrote that Clinton 'appeared to have something quite off about her appearance.'

He added: "Hillary’s eyes appeared not in-sync with one another, as the left eye looked to be cock-eyed and displaced, especially as she looked towards the left."

3 ABC anchor Sarina Fazan grilled Clinton on her health in Orlando Credit: WFTS / ABC

Clinton's comments provided the latest information on the state of candidate health and disclosure in the hotly-contested race to be President.

She acknowledged getting pneumonia after she stumbled following a Sept. 11th ceremony she had to leave early in New York and subsequently released a letter from Clinton's physician stating that she is 'recovering well with antibiotics and rest.'

"She continues to remain healthy and fit to serve as President of the United States,"wrote the physician, Dr. Lisa Bardack.