Windsor, U.K. — LensWay, an online optical store, have collated some of the most enduring of eye-care myths and revealed some surprising results.

Carrots help you see in the dark

TRUE Well, kind of: carrots contain vitamin A, a lack of which can cause poor night vision. So, while tucking into ten carrots a day won’t give you the vision of an owl, missing out on them altogether will mean that your vision will deteriorate. Vitamin A could potentially reduce your chances of needing glasses or corrective eye wear.

You can tell if someone’s lying by looking into their eyes

TRUE: (mostly). There’s a belief that if a person is unable to make eye contact with you, there’s a good chance that they’re lying. However, there’s more to it than that, and all sorts of theories abound: for example, some people believe that if someone glances to her or his right (i.e. your left) then that person is likely to be lying. Confusingly, this may be reversed if the person you’re speaking to is left-handed!

Looking directly at the Sun will harm your eyes

TRUE! Looking directly at the sun is extremely dangerous. Exposure to extremely high levels of light causes parts of your eyes to become less sensitive to light or, in extreme circumstances, destroys them). That’s just one of the ways that staring at the Sun unprotected can harm your eyes – you can even sunburn your eyes (trust us, it’s not pleasant!) so if you’re out in the sun, wear a wide-brimmed hat and sunglasses with a UV filter.

Sitting too close to the TV will give you square eyes

FALSE: No prizes for guessing that your eyes won’t go square from sitting too close for the TV. However, too much screen time does have negative effects, and you should be sure to take regular screen breaks to keep your eyes from getting fatigued. Similarly, if you need corrective lenses to see the TV, then watching it for extensive periods without wearing your glasses can lead to eye strain.

Reading in low light will damage your vision

FALSE: Another one of those myths that’s been doing the rounds for years without a shred of evidence. Although reading in dim light isn’t ideal (you’ll find it much easier if you turn a light on!), it won’t cause any long term damage to your eyes.

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