17
How come do we see neatly without correction under water? (lemmy.world)
submitted 2 months ago by to c/asklemmy@lemmy.ml
16 comments fedilink hide all child comments
 

When snorkeling, scuba diving, or just swimming with goggles, you don't need corrective glass, why does water do this and not air? Both are transparent continuous fluids.

you are viewing a single comment's thread
view the rest of the comments
[โ€“] 7 points 2 months ago (1 child)

OP, have you always been using corrective goggles without knowing?

  • permalink
  • fedilink
  • source
  • hideshow 1 child comment
    •
  • [โ€“] [S] 1 point 2 months ago* (last edited 2 months ago)

    Absolutely not, I got them in a retail shop. I do not see clearly beyond 50 cm without glasses. I could definitely see crisply a jellyfish on the seabed, probably 3 meters below. I watched a dead jellyfish once at my feet on the beach, and I had to crouch to actually see what it is. I see from the comments it's clearly not working for everyone, so maybe only myopia rather than farsightedness, and maybe to a certain degree only

  • permalink
  • fedilink
  • source
  • parent