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When you think of John Lennon from The Beatles, you're likely to picture him with his circular, wire-rimmed glasses. But at times, he wore , or at least he tried to. They kept pinging out of his eyes.

Why and what Lennon did to help his contacts stick is part history and part vision science. As I propose in , it also involved smoking a lot of pot. Lennon didn't like wearing glasses Before 1967, Lennon was rarely seen in public wearing glasses.



His reluctance to wear them started in childhood, when he was found to be shortsighted at about the . Nigel Walley was Lennon's childhood friend and manager of The Quarrymen, the forerunner to The Beatles. Walley : "He was as blind as a bat—he had glasses but he would never wear them.

He was very vain about that." In 1980, Lennon magazine: "I spent the whole of my childhood with [..

.] me glasses off because glasses were sissy." Even during extensive touring during , Lennon never wore glasses during live performances, unlike his hero Buddy Holly.

Then Lennon tried contacts ...

ping! Roy Orbison's guitarist introduced Lennon to contact lenses in 1963. But Lennon's foray into contact lenses was relatively short-lived. They kept on falling out—including while , (when a fan threw a jelly baby on stage that hit him in the eye) and .

Why? That's likely a combination of the lenses available at the time and the shape of Lennon's eye. The soft, flexible contact lenses worn by millions today were not commercially available until . In the 60s, there were only inflexible (rigid) contact lenses, of which there were two types.

Large "scleral" lenses rested on the white of the eye (the sclera). These were partially covered by the eyelids and were rarely dislodged. But smaller "corneal" lenses rested on the front surface of the cornea (the outermost clear layer of the eye).

These were the type more likely to dislodge and the ones Lennon likely wore. Why did Lennon's contact lenses regularly fall out? Based on the for glasses he wore in 1971, Lennon was not only shortsighted, but had a moderate amount of . Astigmatism is an imperfection in the curvature of the cornea, in Lennon's case like the curve of a rugby ball lying on its side.

And it was Lennon's astigmatism that most likely led to his frequent loss of contact lenses. , manufacturers did not typically modify the shape of the back surface of a contact lens to accommodate the shape of a cornea with astigmatism. So when a standard rigid lens is fitted to a cornea like Lennon's, the and slides down when someone raises their upper eyelid.

That's when it can ping from the eye. What's pot got to do with it? Lennon realized he could do one thing to keep his contact lenses in. According to an interview with his optometrist, Lennon : "I tried to wear them, but the only way I could keep them in my bloody eyes was to get bloody stoned first.

" So how could smoking pot help with his contact lenses? This likely led his upper eyelids to droop (known as ). We don't know how exactly cannabis is related to the position of the eyelid. But several have reported cannabis-related ptosis.

Cannabis may reduce the function of the levator palpebrae superioris, the muscle that raises the upper eyelid. So while Lennon was stoned, his lowered eyelids would have helped secure the top of the lens in place. Lennon wore contact lenses from late 1963 to late 1966.

This coincides with The Beatles' peak use of cannabis. For instance, Lennon refers to their 1965 Rubber Soul album as " ." Back to glasses Ultimately, Lennon's poorly fitting contact lenses led him to abandon wearing them by 1967 and he began wearing glasses in public.

His frustrating experience with contact lenses may have played a role in the genesis of his iconic bespectacled look, which is still instantly recognizable over half a century later. This article is republished from under a Creative Commons license. Read the .

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