The Idea from Leonardo da Vinci  来自达·芬奇的启示

隐形眼镜的设计最早可以追溯到达·芬奇。在一份1509年的手册中，达·芬奇写道，把头伸进盛满水的半球型玻璃缸向外看，发现原本看不清的物体变得清晰了。受这一原理的启发，人们想出了各种办法。有人提议可以将充满水的软管直接附着于眼球表面，但是这一方面有个大难题：无法眨眼。

The design of the contact lens can be traced back to Leonardo da Vinci who, with a bowl of water, kicked off the whole cringe-worthy history. In a manual published in 1509, da Vinci noted that when you stick your face in water, you see things differently. He wasn't really talking about correcting vision at this point, but manipulating the cornea's power is the idea behind the contact lens at its most basic.

From there, it was a natural progression to assume that a tube filled with water smacked directly against the eyeball would do something cool.The problem: Right on top of the eye meant no blinking allowed. [/cn]Other proposals included tubes held snug to the eyelids with a headband and capsules filled with "animal jelly." None were viable. None saw real-world testing.

以上图片摘自top10rankings。