DIY Fluid Goggles

[phreak]

And here is a photo of the finished item

[bevan dewar]

phreak, or anyone else, have you fixed the double-vision problem? in theory it must be fixable but i'm guessing it will take a lot of experimenting, filing and re-glueing.
bevan

[phreak]

Hi
You get double vision from the lenses not being parallel to each other.

The first thing to check when you buy the goggles is if the front faces are flat inside and out, then put them on and get a buddy to check if the front faces are parallel to each other across with a straight edge (up and down wont matter as you can adjust this)

If the are nearly there then you can adjust them later with the nose strap and the head strap

I also put the goggles on and marked the centre of my eyes by looking straight out and drawing a cross with a chinagraph pencil to get the rough lens position

To check the lens angle in the goggles dry, put on a bright light and look at it through the fitted lenses and you will see one big dot (hopefully)
or you can adjust to get one big dot with the straps and moving each goggle on your face

hope this helps

Andre.

[bevan dewar]

thanks andre. i've improved on my design. i changed the goggles because the old ones were a bit flimsy. with the new goggles i found it worked better to attach the optical lenses to the outside of the goggle lenses. i hadnt tried this configuration on the old lenses but i think it might not have been as effective, because the lenses on the new goggles sit closer to the eye. the double vission problem has also been easily fixed. one final improvement i made(after taking the photo) was to remove the rubber skirts on the eye pieces. might not always improve things but it does seem to make it easier to adjust the allignment of the goggles on the face ie they sit where you leave them better.

[jacobwaerness]

Dear Readers!

I have read this thread with great interest, and it has inspired me to participate in developing the concept of fluid goggles.

It seems to me that our eyes get far-sighted in water. Contact lenses, as the other lenses mentioned in this thread, should be able to compensate for this phenomenon. Do you have any experience or knowledge if you can use contact lenses to get perfect vision in fluids?

According to my reasoning it should be possible if you get the right plus-power lens. Contact lenses are made in powers up to +30.

If this works I imagine that you could get cheap fluid goggles with excellent field of view.

Any inputs are appreciated.

Jacob

[efattah]

Ordinary soft contact lenses have almost no power underwater due to the fact that their refractive index is close to water. The net power underwater that you need is about +45 to +60D. However, to my knowledge bausch & lomb soft scleral contacts have a +200D power outside of the water, which drops to +45D or +60D in the water.

An almost identical discussion thread as this one passed along mark barville's 'freedivelist' e-mail list back in September 1998, during the early days of the fluid goggles (which, at the time, we called 'saline goggles'). I was repeatedly flamed on the list for 'stupid and irrelevant ideas' which had 'nothing to do with diving.' People thought that the fluid goggles were a 'joke' which 'couldn't possibly work.' Even famous trainer Rudi Castineyra (trainer of Yasemin & Tanya), didn't believe that the goggles would work until I sent him a prototype!


Eric Fattah
BC, Canada

[bevan dewar]

an update on my ever improving design: i was having a small problem with bubbles collecting between the lense of the goggle and the optical lense i had mounted on the outside of the goggle lense. didnt know whether to make more holes in the black plastic 'pipe' i had mounted the optical lenses inside, which would allow a freer flow of water, or to totaly seel it up, perminently trapping water inside.
what i did instead was remove the pipe till i had a normal pair of swimming goggles again, the with a red hot screwdriver i melted a nice neat hole in the front of each lense, of the diameter of the plastic pipe. i then wedged the pipes into the holes, securing it with a bit of superglue and plumbers putty. a new photo wont show much cause they look much the same as before, except they are now missing the plastic lense that previously came between the eye and the glass optical lense. the optical lense can now be cleaned from both sides. and not having to look through two lenses seems like it may even have improved the optical characteristics slightly.
bevan

[bevan dewar]

an update on my ever improving design: i was having a small problem with bubbles collecting between the lense of the goggle and the optical lense i had mounted on the outside of the goggle lense. didnt know whether to make more holes in the black plastic 'pipe' i had mounted the optical lenses inside, which would allow a freer flow of water, or to totaly seel it up, perminently trapping water inside.
what i did instead was remove the pipe till i had a normal pair of swimming goggles again, the with a red hot screwdriver i melted a nice neat hole in the front of each lense, of the diameter of the plastic pipe. i then wedged the pipes into the holes, securing it with a bit of superglue and plumbers putty. a new photo wont show much cause they look much the same as before, except they are now missing the plastic lense that previously came between the eye and the glass optical lense. the optical lense can now be cleaned from both sides. and not having to look through two lenses seems like it may even have improved the optical characteristics slightly.
bevan

[wdaf]

Hi,

i want to order some lenses at edmundoptics.com, but the link doesn't work.

http://www.edmundoptics.com/Buy/Car...fm?itemid=10371

whats the exact name of the lens?

thx

wolfgang

[JasonWelbourne]

http://www.edmundoptics.com/onlineca...productID=1747

Item Description = " LENS PCX 20 x 20 UNCTD TS "
Item Number = NT45-237

I found it by the itemid in the original URL that didn't work. "itemid=10371" I have some spare one's I never used if you would like to buy some of those.

[Parapsycho]

$26 for a lense seems like alot. How much were premade goggles, for comparison?

[efattah]

Ready made goggles are $165.

[wdaf]

THX for the info.

[Parapsycho]

oh. hmmm.
Perhaps I need to get a job, then work on mine....

[Clunacek]

fluid googles - lenses only 85,50$

http://www.avex.cz/martin_stepanek/aj/shop.htm