Presbyopia and High Accuracy Woodworking

[Thomas Wilson]

When I was in my late 40's early 50's, I took a short hiatus from woodworking to go back to school for a PhD. When I finished the degree and got back to woodworking, I learned that Mother Nature had played a trick on me. My eyes were not the same as before. I could not see the fine detail I used to see. To compensate, I purchased some accuracy in the form of digital readouts from Wixey and digital calipers of various forms. I also learned about the 5 cut method for multiplying crosscut error so that I could set up my saws more accurately. The end result is that I am a much more accurate woodworker than I was when I could see better. There is an unexpected benefit from the accuracy. I am spending less money on sandpaper. Life is good.

TW

[Kent A Bathurst]

One step back leads to two steps forward.

Plus - You got me to get out the online dictionary.

Good luck............

[Jamie Buxton]

Yeah, the eyes go bad with age. One of my solutions has been binocular loupes. You get a bunch of magnification (like 3x), but the focal distance is long enough that sharp tools aren't threatening. Ones that are qualified for surgery are a thousand dollars. But ones for dental hygienists or beauticians (think manicures) are less than a hundred.



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[Jim Matthews]

Very bright lighting will make the most of what you have.

When your pupil dilates, the depth of field perceived will shrink.

When your pupil constricts (as in bright light) your depth perception
increases. I find that few tasks - sharpening saws with small teeth for instance -
require magnification.

When you're REALLY nearsighted (me, like Tom Clancy was) magnifying glasses as shown above are ineffective.

For me, a magnifying lamp that both eyes look through works best.

[glenn bradley]

Great to hear of a positive effect of old age :D. I new I was getting better instead of older.

[ian maybury]

Seems to be the norm Thomas. Peculiarly enough i also spent a few years buried on a PhD (technology management), and at the end of it found that my eye sight had significantly disimproved. Think the large amounts of computer and short focal distance work (reading) mess things up - the musles that control focusing of the lens get so they can't relax. As does stress. A few months off reading helped my eyes enormously.

I've run into three separate issues - my shortest focal distance is longer than that needed for close work, so that requires glasses. As Jim I need huge amont of high intensity lighting. Whether it's cause or effect, i also find i now have a problem reading a finely divided rule properly - the eyes can't decide which mark is which and seem to keep on hunting back and forwards. Thyroid trouble can lead to very similar issues..

A quick look suggests that loupes go from junk to OTT in terms of cost and quality. Can you recommend a brand and source for the ones you have Jamie?

[Thomas Wilson]

Thanks for the responses. I knew I was not alone in this group with the problem of old eyes. I have also added some more lights and I have an inexpensive magnifying headset to help with the eyesight. I am fairly nearsighted so taking off my bifocals still allows me to focus up very close. The problem is just the loss of convenience. I can't see up close and far away without changing the glasses. The inexpensive digital measuring tools have helped avoid some of the close work. I don't have to see the saw tooth and the scribed line on the piece so closely. I can actually trust the readout which I can still see. I still mark the work but I don't have get down to see that I am splitting the line. I can just look to see that I am not an inch off which is a different aging problem.

I am really working on high accuracy techniques. I use digital calipers more often than a tape measure or rule. I use a calculator more. The quality of the work is better, there really is less work in adjusting things for final fit, and it is faster.

[Jamie Buxton]

.. Can you recommend a brand and source for the ones you have Jamie?

Unfortunately, no. The name on my loupes is Joy-Sight. I bought them from a beautician-supply company that doesn't seem to exist any more. In a quick zoom around the web, I don't see any products that look exactly like them. IIRC, they cost like $60 ten years ago.

My dentist now wears binocular loupes. His undoubtedly cost a lot more than mine; doctor's anything costs a lot. But his also have a really bright light on them. That might be a useful feature for you.

[ian maybury]

Ta Jamie - will have a dig on the web...

[Chris Padilla]

I'm nearing 46 and my up-close vision has gone into the toilet. It really really really stinks but I guess I'll cope...everyone else seems to. Distance is still 20/20. :)

These (http://www.amazon.com/gp/product/B000WUXOEM/ref=oh_aui_detailpage_o09_s00?ie=UTF8&psc=1) from Amazon work pretty good and are reasonably comfortable.

[Jim Andrew]

My eyes are like Chris, still have good distance vision, can't focus up close. I wear reading glasses in the shop. Started with 1.25, now 2.5.

[Joe A Faulkner]

http://www.magnifier.com/hands_free_magnifier.htm features some low cost options.

[Matt Lau]

I'm not sure about the low-cost options, but I can vouch for Orascoptics. Mine are 2.5x, and I'm hoping to get 3.5x or 4x sometime.
They're pricey, but well worth it. The best loupes can make a huge difference.

Have you thought of a swingarm magnifier/light?

[Erik Loza]

I'm nearing 46 and my up-close vision has gone into the toilet. It really really really stinks but I guess I'll cope...everyone else seems to. Distance is still 20/20. :)


My eyes are like Chris, still have good distance vision, can't focus up close. I wear reading glasses in the shop. Started with 1.25, now 2.5.

Same boat, here. I had Lasik about seven years ago and the opthamologist told me you, "You can choose either near or far, but not both because once you're in your 40's, the eye loses it's elasticity and ability to adapt to both near and far". Great distance vision but I wear reading glasses for fine work. I keep a few pairs of the el-cheapo Walgreens +1.25 or +1.50's in the garage. Lose a pair, find a pair. Works for me.

Erik

[Gene Takae]

I'm nearing 46 and my up-close vision has gone into the toilet. It really really really stinks but I guess I'll cope...everyone else seems to. Distance is still 20/20. :)

These (http://www.amazon.com/gp/product/B000WUXOEM/ref=oh_aui_detailpage_o09_s00?ie=UTF8&psc=1) from Amazon work pretty good and are reasonably comfortable.

You're lucky to still have good distance vision. I've had to wear glasses for distance since the age of 8-and now 50+ my near vision is going too. :(

[Alan Lightstone]

Same boat, here. I had Lasik about seven years ago and the opthamologist told me you, "You can choose either near or far, but not both because once you're in your 40's, the eye loses it's elasticity and ability to adapt to both near and far". Great distance vision but I wear reading glasses for fine work. I keep a few pairs of the el-cheapo Walgreens +1.25 or +1.50's in the garage. Lose a pair, find a pair. Works for me.

Erik
Ditto, but for my work I need to wear progressives. I have to be able to focus on near, middle, and far focal lengths within seconds of each other, repeatedly. Took a little getting used to, and I don't wear them in the workshop because they're not impact glass, so I'm stuck with the bright lights scenario for now.

[Erik Manchester]

I am using bifocals in the shop (lol) but I really want a set of these once approved for use. The inventor will be a billionaire.

http://www.cbc.ca/news/technology/ocumetics-bionic-lens-could-give-you-vision-3x-better-than-20-20-1.3078257

[John K Jordan]

Bright light really does the trick for my aging eyes. In the woodshop area of my new shop I wired up T5 flourescent fixtures, four bulbs each, 5000 lumens per bulb daylight, 24 bulbs total. I installed similar fixtures in my welding room snd maintenance bays. Plus six 11 directed task lights over rhe lathe, bandsaw, DP, and sharpening station. Lower-power LED lights on a separate switch provide passage lighting. The T5 fixtures are the same the local Home Depot uses as high-bay lights. The T5s are far brighter than T12s or even T8s.

I took adantage of the T5 ballast feature such that only 2 bulbs in each fixture come on unless I want more light for certain tasks and throw one of 5 aux switches in the woodshop area. This saves on power for normal work.

Altogether, this is an incredibly wonderful amount of light. While some people might want sunglasses when they visit, I would hate to go back to working any other way.

And what Jim said is absolutely true - the more light the better the eyes can focus at any distance.

JKJ

[Erik Loza]

Ditto, but for my work I need to wear progressives. I have to be able to focus on near, middle, and far focal lengths within seconds of each other, repeatedly. Took a little getting used to, and I don't wear them in the workshop because they're not impact glass, so I'm stuck with the bright lights scenario for now.

I have bifocals now but to be honest, I never really use the "near" part. Still some astigmatism the lasik could not correct, which is why I wear the glasses for driving at night (difficult to read street or highway signs at night). When i next get an eye exam, think I am going to omit the bifocal part.

[Chris Padilla]

I am using bifocals in the shop (lol) but I really want a set of these once approved for use. The inventor will be a billionaire.

http://www.cbc.ca/news/technology/ocumetics-bionic-lens-could-give-you-vision-3x-better-than-20-20-1.3078257

It needs to make the same sound as it did on TV for Steve Austin, The Six-Million Dollar Man. :)