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A dad who thanked donors for saving his sight to allow him to watch his son grow up has revealed his child could develop the same condition.

When he was 12-years-old Danny Wardall was diagnosed with Keratoconus, a disorder of the eye which results in progressive thinning of the cornea.

The condition meant that by the age of 17 he had undergone two cornea transplants to save his formerly impaired vision.

However the dad-of-one, who has a two-year-old son Nathanial, said his hereditary condition could have been passed to his son and is urging people to sign up to become an organ donor after they die.

The 36-year-old from Crosby said: “I would have been walking around with a white stick and a dog by now if it wasn’t for my donors.

“What they have given me is invaluable - they have allowed me to watch my son grow up.

“If I was blind I don’t think I would be able to have the same bond with him that we have.

“We are very close - he is a bit of a daddy’s boy.”

Danny, who works in sales, said it would “break his heart” if Nathaniel was diagnosed with the condition, which also affected his mum and great grandmother.

He said: “There is a risk that he will get it.

“And obviously when you have kids all you want for them, at the minimum is to be happy and healthy.

“When he is five or six years old they will be looking out for any signs.”

Danny said his dad spotted that he was squinting when watching television which led to his condition being diagnosed and he has had two further surgies and will need more in the future.

He said: “When I was younger my vision was just ridiculously bad.

“I could hardly see anything it was just blurred colours.

“I had to wear contact lenses the size of my whole eye because normal lenses would fall out.

“Because of the condition, whereas other people’s eyes are football shaped mine are rugby ball shaped and it is that point that they have to try and flatten.”

Although more than nine out of ten people on the NHS Organ Donor Register have consented to donate their eyes when they die the NHS Blood and Transplant (NHSBT) eye banks are 21 percent below the levels needed.

NHSBT is calling on more people to agree to donate their eyes after they die.

Danny who champions any type of organ donation said: “When you die the best thing you can do is to give someone else the gift of life.

“Some people are scared by it, but you could look at is as though a part of you lives on.

“The gift I have been given is invaluable and I live every day trying to be the best dad I can be and being able to see is a massive part of that.”

The dad has also appealed to people with the condition and their families to come forward for research.

He said: “Doctors don’t know how the condition is passed, whether it is in a gene or in DNA, so I have put myself forward for studies and I would ask others to do the same.

“It may put you out for a day or a couple of hours every now and again but it may ultimately find a cure.”