How does the vision of a fish that was taken out of the water become – short-sighted or farsighted?

Water has a refractive index of 1.33 relative to air (1.00). It is logical to assume that her pupil is designed for water, and refracts the rays at the water / eye transition exactly so as to focus on the retina. Also, the cornea of the eye must have a higher refractive index than water (for the same purposes). If, instead of water, there is air outside, then the difference in the coefficients will increase even more – refraction will increase – and the picture will be focused before reaching the retina. Those. myopia.