Why do we need to wear goggles underwater to see straight

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Wearing goggles underwater is necessary to see clearly due to the phenomenon of refraction. Water and corneal tissue have similar indices of refraction, which means light does not focus properly on the retina when submerged. Without goggles, the light entering the eye is distorted, leading to blurry vision. Goggles create an air pocket in front of the eyes, allowing light to refract correctly, improving clarity. Understanding this optical principle highlights the importance of goggles for clear underwater vision.
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I have a question i know it has something to do with refraction but uh... why do we need to wear goggles underwater to see straight>??
 
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water and corneal tissue have about the same indices of refraction so light isn't as focused by the time it reaches the retina, as it would be after traveling through air first
 

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