The mother of blue-eyed Asian twin girls who are deaf due to a rare medical condition has appealed for help to give them hearing aids.

The nine-year-old sisters Narin Gam and Nara Gift Yiaoya were born with stunning light blue pupils in Mukdahan, Thailand. Narin Gam has two blue eyes while her sister has one blue and one brown eye.

They have a striking appearance that attracts attention whenever they go outside. But the genetic disorder has also affected their ears, leaving them deaf and mute.

Their single mother, Kham Chanwiporn, 42, is an immigrant who fled from neighbouring Laos and is unable to access the state health service in Thailand.

She has now asked for help from people to donate hearing devices for her daughters. She hopes that one day doctors can correct their hearing.

Footage shows the twins posing together on November 10. One sibling has both eyes in the shade of azure, while the other has only one blue eye.

They joined their mum in her fruit stall in the market as she sold watermelons while wearing matching pants.

Mother Kham, who was originally from Communist Laos before marrying a Thai man, said: 'My daughters can see normally even though their eyes have unique colours, but they cannot hear. They also cannot speak because of this. I feel so sorry for my girls as their mum.

'I would like them to hear my voice so I can tell them how much I love them. I want them to be able ot laugh and joke with other girls.'

The youngsters go to a special needs school that teaches them sign language, but Kham hopes she can afford hearing aids for them.

She said: 'I am a single mother. Their father is Thai, but I divorced him. He left me while I was only a month pregnant.'

The family of three lives in a rented house with the single mum being the sole provider. She makes the equivalent of around 5GBP a day.

The mother said: 'My daughters are very special to me. They are the reason I survived working various jobs including selling fruit in the market. They are my lucky charms.'

Kham, whose eyes also had shades of blue, added that the girls could have inherited the condition from her.

She said: 'I want what is best for them but unfortunately I cannot afford the hearing aids. They can hear me when I shout so a hearing aid will change their lives.

'I do not want to burden anyone, so I work hard, but some assistance with the hearing aids will be a big improvement.'

Some good Samaritans have contacted the mother, and the sisters are scheduled to visit Nakhon Phanom Hospital to explore possible treatment options.

Subin Prasopbua, headmaster at the Mukdahan School for the Deaf, said: 'The girls can study here for free until they finish primary school. But then they will have to pay for school.'

Medics have not tested the youngsters, but they could have Waardenburg syndrome, which affects only one in 40,000 babies born. The rare genetic disorder that can cause hearing loss, distinctive colour features such as blue eyes and sometimes changes in skin and hair pigmentation.

However, it is also a known cause of hearing impairment at birth or develops early in life.