The 17-year-old UK girl is blind in one eye after doctors at her local hospital failed to notice a major infection.

Courtney shook her mum awake in the early hours of the morning, as excruciating pain radiated from her eye.

The 17-year-old had taken out her contact lenses two hours earlier… and had been trying without success to sleep since then, with one eye weeping endlessly agonising tears.

“I literally could not sleep, I wanted to cry… my eye was watering non-stop for two hours,” the UK teen revealed in a viral TikTok video.

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Courtney had felt a little bit of pain when she removed her contact lenses before bed last Sunday.

But she didn’t think anything of it until her eye started weeping uncontrollably a few minutes later.

Fast forward a few hours and Courtney’s eye was still watering and she was now in so much pain that she could barely contain herself.

“I couldn’t see and it was dripping… I knew this wasn’t normal so I woke up my mum,” she retold.

“She was like, ‘you're going to be fine, go back to bed’ – but it kept getting worse.”

Finally, Courtney and her mum went to emergency, hoping that the doctors there would be able to work out what was wrong with her eye.

But, unfortunately, after waiting for hours, doctors told her that she had “scratched” her cornea “a bit” and was sent home with eye drops, which did nothing to curb the extreme pain.

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Instead, the agony only got worse throughout the day, with Courtney revealing that she screamed so much that “the neighbours actually rang the police because they thought someone was being murdered”.

Unsure what else to do, Courtney’s mum took her daughter back to the hospital again later that afternoon.

“They told me there was nothing they could do… the nurse even made snarky comments about me coming back to see a doctor again,” Courtney described.

“They did nothing after we waited for hours. I was literally crying to the receptionist, literally begging to be helped… I was screaming in pain."

But once again, Courtney was sent home, despite the fact that she was clearly in immense pain.

By the next morning, she was in so much agony that she doesn’t remember going back to the hospital a third time.

She later learned from her mother that she had been so “dazed and in pain” that she had told doctors that she was hallucinating and didn’t know where she was.

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However, this still wasn’t enough to get Courtney admitted into the hospital – with the teen sent home again for the third time.

By this point, her entire eye had turned a milky white.

So Courtney’s mum decided to try a local eye clinic in the hope that they would be able to help her daughter.

“I went to the eye clinic, the doctor takes one look at my eye and his face drops… he said: 'you might go blind'.”

It turned out that Courtney had keratitis (an inflamed cornea) that had become infected and formed an ulcer over her eye, obliterating her vision.

Despite, daily visits to the eye doctor and hourly prescription eye drops, Courtney’s infection still hasn’t improved, although the pain has gone away.

“My eyesight hasn’t got better… all I see is white,” she explains, adding that she likely will never regain her vision in that eye.

“If I am looking out of both eyes, there is just nothing on one side- it’s not black, it’s just nothing.”