It is claimed thjat you can see better underwater if you wear goggles or diving masks..why?

my teacher asked us to answer this question for our assignment and i dont know why. I've already searched the net but found no explanationIt is claimed thjat you can see better underwater if you wear goggles or diving masks..why?
In a human with 20/20 vision, the eye refracts (or bends) light so that it forms a sort of picture on the back part of your eyeball.





At the same time, water also bends light. You can observe this by filling a glass of water and moving your hand behind the glass.





When a person is under water, both the water and the eye refract light, causing the light to focus in the wrong spot. This is what makes everything blurry while you're underwater.





Now, when you use a dive mask or goggles, you're adding air back into the equation. The light passing through the water still bends, but it also has to pass through the goggles to get to your eye. This additional bit of glass and air bends the light enough that your eye can make sense of it.





The following source has is better if you want a more scientific explaination.It is claimed thjat you can see better underwater if you wear goggles or diving masks..why?
because youre not always blinking from shtuff gettin in your face....its kinda straightforward.
because wearing goggles makes it easier to see...when you are underwater and you open your eyes all the water goes in your eyes and makes it so blury
i thought it was pretty obvious why, the googles protect your eyes because most people can't keep your eyes open if there's a constant source of water in them. maybe you should go to the special classes, this is common sense
what a dumb question...what was ur teacher thinking?





i think the answer to that is obvious...because there is a pocket of air between you and the water. water isnt getting in your eyes and stuff....you have like a little viewing screen
Yeah what the above answer said, but also Diving mask Goggles allow more light and broader vision than swimming goggles which are sometimes tinted for sunlight and made smaller and tighter to stay on during diving in the water for competition narrowly scoping your field of vision





But yeah the water refracts light against your eyeballl blurring your vision
You can, and the reason is that the water is not touching your eyes, therefore your vision is not blurred. It's like looking at a clear fish tank except you are ';inside'; swimming with the fish.