The first thing they pass through is the 'cornea' . . . that's the curved 'bubble' in front of your eye that covers the colored part.
Refraction happens at several levels of the eye, but the cornea is the first.
The transparent layer where light waves first enter the eye and are refracted is called the cornea. The cornea not only protects the eye but also plays a crucial role in focusing light onto the retina. It works along with other structures like the lens and aqueous humor to provide clear vision.
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