Why can I see better underwater?
This morning I went swimming early, so I didn't put in my contacts, I am near sighted. I could hardly see a thing, but once I put on my goggles and went underwater I had perfect vision and could see clear across the pool.
Answers:
I'm jocking. I guess you suffer from Myopia, don't you? Well, I read that water has a higher refractive index than air, that is why light that enters into your eyes when you are on the earth behaves differently from the light that enters your eyes when you are underwater. You know, light can also pass through the water!
Light is necessary for your sight, because without light penetrating through the pupil and then into the eye, until the retina (in the back of the eye), the eye cannot construct an image of the object you are looking at.
Well, light that enters your eyes while you are underwater creates a sort of distortion, that affects normal vision, causing a severe hypermetropia. Hypermetropia means that this person cannot clearly see objects which are distant from him.
So, if a person is normal sighted, it may have hypermetropia problems in the water, BUT, a person who is short-sighted, would se better underwater, because myopia and hypermetropia are opposite effects. So, people with severe myopia can see, in theory, better than those who don't have eye problems.
And, now that I'm thinking about that...I swam without contacts once...and I could see better underwater than on the earth.
Is it hard to tread/float in the deep end for 10 minutes?
the goggles were a substitute for the conacts, i guess.Who invented the swimming pool game"Marco Polo"?
you must be gifted good vision under water. :-)Can i lose my belly by just running and swimming? i dont have time to go to the gym?
Because water don't touch your eyes while you wearing goggles so you can open them and look clearly !More Questions & Answers...