Abstract：
John Lennon has an enduring, instantly recognisable, iconic, spectacle look. However, prior to 1966, he was rarely seen wearing glasses in public. From ages 7 to 26, he effectively hid his myopia away, including a period of unsuccessful contact lens wear during Beatlemania. This narrative review examines John\'s experience with contact lenses from 1963 to 1966 when he wore corneal rigid lenses made from polymethylmethacrylate, which regularly fell out. This frequent lens ejection was most likely due to the interaction between his upper eyelid and a spherical back surface rigid lens fitted to his right eye, which had a moderate degree of with-the-rule corneal astigmatism. John\'s recollection that his contact lenses stayed in place while \'stoned\' supports this hypothesis, as a cannabis-induced upper eyelid ptosis would reduce the likelihood of lens ejection.
摘要：
约翰·列侬有一个持久的，立即可识别，标志性的，奇观看。然而,在1966年之前，他很少在公共场合戴眼镜。从7岁到26岁，他有效地掩盖了近视，包括Beatlemania期间戴隐形眼镜不成功的时期。这篇叙述性评论考察了约翰从1963年到1966年佩戴由聚甲基丙烯酸甲酯制成的角膜硬质镜片时的隐形眼镜经验，它经常掉下来。这种频繁的镜片弹射很可能是由于他的上眼睑和右眼的球形后表面刚性镜片之间的相互作用，具有中等程度的正常角膜散光。约翰回忆说，他的隐形眼镜停留在原地，而“扔石头”支持这一假设，因为大麻引起的上眼睑下垂会降低晶状体弹射的可能性。
