If you open your eyes underwater, the outlines of objects appear blurry. Why?

At the air-cornea interface, the rays are refracted more strongly than at the water-cornea interface. Therefore, when the eyes are open in water, after passing through the lens, the rays are collected beyond the retina.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.