IF you find yourself squinting while reading or if you suffer with slightly blurry vision at times, then it might be time to book in with the optometrist.
But before you do, an eye doctor has revealed a simple test you can do yourself at home to see if you might need glasses.
In a video on TikTok, American eye doctor Dr Brittani Carver revealed that astigmatism could be the reason your vision isn't perfect.
According to the NHS, astigmatism is when "your eye is shaped more like a rugby ball than a football, so light is focused at more than one place in the eye".
Along with blurry vision, astigmatism can also cause headaches and eye strain – but can easily be corrected with prescribed glasses or contact lenses.
To help you work out if this is something you might have,perhaps give Dr Carver's test a go.
The doctor,from the Better Vision Optometric Center in Fayetteville US, explained: "Astigmatism is when your eye is shaped like an American football, it can cause blurry vision but can be corrected with glasses or contacts.
"Do you have astigmatism? Well, if you don't know, let's do a screening test to see."
She then shows a picture which has thick black lines surrounding a white centre circle.
Then she asks those watching to start by covering their right eye, focusing on the picture with your left.
"What we're gonna look at is the star here," she says. "What we're looking for is any lines that are darker or blurrier or stand out.
"If you see lines either up and down, side to side that are standing out, that is a screening test to let you know that you do have astigmatism."
Then she says to switch eyes and do the exact same thing.
The clip has been viewed over one million times with loads of people shocked to discover their results.
"Have it in my left eye, but not my right," one person said.
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And second quipped: "Me still trying this test when I know I have astigmatism already."
Meanwhile, a third asked: "I see diagonal at four o'clock and 10 o'clock when I cover my right eye, what do I do now?"
"That means you may have astigmatism and need an eye exam. Go and see your local optometrist," Dr Carver advised.
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