reader bifocal strength, same as your daily wear or different?

[bradlw]

talking non-prescription here

I can see my computer and guage, but not well...so it's time to get some bifocal lenses
...or maybe just find a magnifying glass and attach a clip to it.....

So those of you that wear non-prescription readers through general life
and use either stick on or properly ground replacement lenses with bifocals in your mask, what strength/power have you found works for you?

I know there's probably special considerations for photographers and maybe other special cases....but I'm asking more about a general perspective.... to see the SPG and computer prmarily, and less so but also for inspecting little things I want to see down there...maybe reading a placard on an old wreck or looking at an intracately detailed coral head, etc.. Things that might be just a little further away than where I'd be holding a book to read. (I'm thinking desk computer monitor distance)

 

[oldschool45]

I went a little stronger than my normal. Mainly to see my dive watch better(Garmin Decent G2). Unless your close vision is really bad I don't know how well the bi-focal masks will work on small critters. My wife has the same problem but her solution was to buy a dive computer with a bigger screen...she can't see squat under rocks so I make sure I get good gopro footage of it.

 

[happy-diver]

Easy!

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[gamon]

Easy!

None of your examples address the Ops question which is about the near vision "add" on top of the distance Rx.

 

[ahereng]

My bifocal mask is now on +3, but my normal reading-glasses is +1,5 and +2,0 depending on what I'm reading.
I think the extra strength on the mask is because the arm/computer is closer to my face due to drysuit and webbing restricting movement of my arm.

 

[bradlw]

I went a little stronger than my normal. Mainly to see my dive watch better(Garmin Decent G2). Unless your close vision is really bad I don't know how well the bi-focal masks will work on small critters.

Thanks...you've pointed to the root of my question, I think...
so to clarify...it does have a little something to do with focal length for sure!

Without correction, I can see the gauge in decent light, but I can't really see the tick marks... I can tell it's 1,000...or just over 1,000...and can extrapolate that it's probably about 1,200 for example...but it's hard at just a quick glance....

Out of the water at work, I have a pair of over the counter readers, called Multifocal by foster grant. They're essentially non-prescription progressive lenses. As advertised, there are three zones... the lower portion for reading, the mid portion is a little weaker magnification meant for seeing a computer monitor on your desk, and the upper portion is lower magnification yet and meant for viewing a person sitting in the chair on the other side of your desk
I have large monitors that are sitting further away than a "normal" monitor position would be
They work well in this setting but I have no idea what the three powers are on it. I think the low zone for up close is likely +2.5

so my normal fixed power readers that I use at home are far too strong to see my work monitors clearly
but they work well for reading close-up in normal to lower light and for using my laptop
I can get by comfortably for near reading with a slightly lower panel if lighting is good

I can see pretty OK at distance. I had lasik a bunch of years ago, so my distance vision is not what it was when I was younger but it works....

+2.5 is probably my "normal", but +3.0 might be a little better

+3.0 for regular reading in very low light, or for extremely fine print
+2.5 works well for reading in low to normal lighting for regular reading
guessing +1.5 ish or maybe less for seeing fine detail at maybe 2-1/2 to 3-1/2 feet away. Here the 2.5 or 3.0 is far too strong and everything blurs-out

So trying to project all of that to SCUBA....
Gauge and computer are close...roughly regular reading distance or a little closer. That I suppose it the primary need
Diving, I'll be looking at some things ranging from say 2ft away to I don't know, say 5 or 6ft away where my OK distance vision takes over....
Sometimes or often lower light is in the mix

I'm thinking that maybe a +2.0 might be a decent compromise to be somewhat helful at those just beyond arm length distances but also help reading the gauges

 

[bradlw]

My bifocal mask is now on +3, but my normal reading-glasses is +1,5 and +2,0 depending on what I'm reading.
I think the extra strength on the mask is because the arm/computer is closer to my face due to drysuit and webbing restricting movement of my arm.

I can see that being helpful for no-joke being able to see really fine stuff, in low light, etc...
but wouldn't be helpful at all for those just beyond arms length distances.

 

[ahereng]

Yeah, looking at smal critters etc. is not easy any longer. They are often in the "unfocused" zone between the readers and the normal glass. I kinda want glasses with three strengths for that purpose.

 

[happy-diver]

Pay attention read a bit interpret what's being said have some knowledge, experience might do you to get some

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None of your examples address the Ops question which is about the near vision "add" on top of the distance Rx.

open your mind consider others reading the thread allowing for various options and situations

Give the people information

 

[gamon]

open your mind consider others reading the thread allowing for various options and situations

Give the people information

The subject, as stated in the thread title and repeated in the first sentence of the original post, is non prescription reading lenses. Your post is about prescription lenses and isn't an option or variation on the topic, it's a completely different topic altogether.

It would be as if someone posted a thread asking about regulators and you start talking about cylinders and saying it's a various option and to give people information.