- vision enhancement for close work - 16 Updates
| Tim R <timothy42b@aol.com>: Dec 14 02:55PM -0800 I've just entered the "post cataract surgery" world. Results were good for distance vision. I can't bring anything close to see anymore, focusing just doesn't work. I don't do a lot of precision work like you all do, but right now threading a needle would be impossible. Reading glasses and a large monitor let me type, but I can't get smaller yet. Before I had it done I was researching digital microscopes, but now I realize it doesn't matter how big something is on a screen if I can't focus on the screen. How have you solved this? Some of you must be up around my age, perhaps even past it <g> |
| Cursitor Doom <curd@notformail.com>: Dec 14 11:33PM On Fri, 14 Dec 2018 14:55:03 -0800, Tim R wrote: > How have you solved this? Some of you must be up around my age, perhaps > even past it <g> I just avoid any PCBs with SMDs! Surface mount stuff is way beyond me I'm afraid. Fortunately I'm only a hobbyist so it matters very little. -- This message may be freely reproduced without limit or charge only via the Usenet protocol. Reproduction in whole or part through other protocols, whether for profit or not, is conditional upon a charge of GBP10.00 per reproduction. Publication in this manner via non-Usenet protocols constitutes acceptance of this condition. |
| "jfeng@my-deja.com" <jfeng@my-deja.com>: Dec 14 04:05PM -0800 You can get reading glasses to +3.5 diopters at your favorite drug store or dollar store. If that is not strong enough, you can get clip-on readers from Daiso (US$1.50 from the store or about US5 from eBay). This will get you to +7 diopters, which should be strong enough. I have seen +5.0 available at Daiso stores outside the US. Of course, you can get prescription lasses from your optician. These can be exactly matched to your pupillary distance and any abnormalities you need to have corrected. My optician charges extra for lenses stronger than +3.0. |
| John-Del <ohger1s@gmail.com>: Dec 14 04:30PM -0800 On Friday, December 14, 2018 at 5:55:05 PM UTC-5, Tim R wrote: > I don't do a lot of precision work like you all do, but right now threading a needle would be impossible. Reading glasses and a large monitor let me type, but I can't get smaller yet. > Before I had it done I was researching digital microscopes, but now I realize it doesn't matter how big something is on a screen if I can't focus on the screen. > How have you solved this? Some of you must be up around my age, perhaps even past it <g> Not an answer but I thought modern cataract surgery implanted a corrective lens. My 80 year old mom didn't even need glasses anymore (except for reading) when she had hers done. |
| Tom Biasi <tombiasi@optonline.net>: Dec 14 07:53PM -0500 On 12/14/2018 7:30 PM, John-Del wrote: >> Before I had it done I was researching digital microscopes, but now I realize it doesn't matter how big something is on a screen if I can't focus on the screen. >> How have you solved this? Some of you must be up around my age, perhaps even past it <g> > Not an answer but I thought modern cataract surgery implanted a corrective lens. My 80 year old mom didn't even need glasses anymore (except for reading) when she had hers done. Had the surgery about two years ago. Don't need glasses anymore even to read. ( Except for medicine bottles and lawyer print.) |
| Fox's Mercantile <jdangus@att.net>: Dec 14 06:56PM -0600 On 12/14/18 6:30 PM, John-Del wrote: > Not an answer but I thought modern cataract surgery implanted > a corrective lens. That's exactly what they do. > My 80 year old mom didn't even need glasses anymore (except > for reading) when she had hers done. That's because it's fixed lens. Typically, you get 20/20 vision for everything from 24" away from your face outward. But because it's a fixed lens, you need reading glasses for anything closer than 24" I had cataract surgery in my right eye last August. All I can say about that is "Oh fuck me, I can see again." But I need to wear reading glasses for the computer and, well, reading. This Includes working on the bench. -- "I am a river to my people." Jeff-1.0 WA6FWi http:foxsmercantile.com |
| Ralph Mowery <rmowery28146@earthlink.net>: Dec 14 07:57PM -0500 In article <pv1el6$437$8@dont-email.me>, curd@notformail.com says... > I just avoid any PCBs with SMDs! Surface mount stuff is way beyond me I'm > afraid. Fortunately I'm only a hobbyist so it matters very little. I started SMD around 64 and am 67 now. With the microscope similar to what every one uses, the SMD is really very easy to work with. Once the trouble is found or a modification is desired, I would rather work with that than the through hole or even the old tube circuits. I only do the board work as a hobby. Takes about $ 300 to $ 400 to get the tools to work with and the microscope is over half that. |
| Tim R <timothy42b@aol.com>: Dec 14 05:08PM -0800 On Friday, December 14, 2018 at 7:57:29 PM UTC-5, Ralph Mowery wrote: > that than the through hole or even the old tube circuits. I only do the > board work as a hobby. Takes about $ 300 to $ 400 to get the tools to > work with and the microscope is over half that. Thanks. Are we talking an optical microscope, or something digital? Any recommendation? I've tried binoculars since the surgery, and they work very well, much better than before. |
| Ralph Mowery <rmowery28146@earthlink.net>: Dec 14 08:54PM -0500 In article <458e7249-e2e0-4c23-a027-f956c106439a@googlegroups.com>, timothy42b@aol.com says... > Thanks. Are we talking an optical microscope, or something digital? Any recommendation? > I've tried binoculars since the surgery, and they work very well, much better than before. This seems to be the best for the money. It is what I bought. It is an optical stereo microscope. The bottom lense is about 8 to 10 inches above the work. https://www.amscope.com/10x-20x-led-binocular-stereo-microscope-boom- arm-with-gooseneck-light.html Look around the internet for the best price. If you can stand his mouth, look on Youtube for Louis Rossman and some of his talks about this scope and other tools. You can get an inexpensive hor air rework station for around $ 60. Has a fine tip soldering iron and hot air waund. Not the best quality,but for the pirce and hobby work it is acceptable. Good one are around $ 300 and up. Learn how to use the hot air tool and you will be glad you did. Good for many things besides the SMD. Say like a 10 pin daughter board soldered to the motherboard. https://www.ebay.com/itm/862D-2in1-SMD-Soldering-Iron-Hot-Air-Rework- Station-Desoldering-Repair-110V/382665136314?epid=12025882815 &hash=item59189e98ba:g:PvgAAOSw64ha87EG Forget all the inexpensive digital crap. I have not tried the high end ones like a Mantis, so can not comment on those, but can not afford one either. |
| Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>: Dec 14 10:33PM -0500 On 12/14/18 5:55 PM, Tim R wrote: > I don't do a lot of precision work like you all do, but right now threading a needle would be impossible. Reading glasses and a large monitor let me type, but I can't get smaller yet. > Before I had it done I was researching digital microscopes, but now I realize it doesn't matter how big something is on a screen if I can't focus on the screen. > How have you solved this? Some of you must be up around my age, perhaps even past it <g> Bifocals from Zenni Optical. Super cheap, and IME good quality. Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics Briarcliff Manor NY 10510 http://electrooptical.net http://hobbs-eo.com |
| Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>: Dec 14 10:38PM -0500 > You can get reading glasses to +3.5 diopters at your favorite drug store or dollar store. If that is not strong enough, you can get clip-on readers from Daiso (US$1.50 from the store or about US5 from eBay). This will get you to +7 diopters, which should be strong enough. > I have seen +5.0 available at Daiso stores outside the US. > Of course, you can get prescription lasses from your optician. These can be exactly matched to your pupillary distance and any abnormalities you need to have corrected. My optician charges extra for lenses stronger than +3.0. The problem is that drugstore glasses use one interpupillary distance (66 mm iirc for men's glasses). If the IPD is wrong by more than about a millimetre, you're liable to get eye strain and headaches. About a decade ago, when I started needing reading glasses, I made a rough measurement of my IPD and ordered glasses from Zenni Optical. They're super cheap, so I got the same frames and prescription with IPDs of 68, 69, and 70 mm to try out. The 69 mm ones were most comfortable in my case, so I standardized on that. Cheers Phil Hobbs |
| jurb6006@gmail.com: Dec 14 08:22PM -0800 >"That's because it's fixed lens. " No, it is not. It is as elastic as it can be without falling out and will respond to your muscles, although not as well. If the lens were fixed you would have zero depth of focus in all but the brightest light when the iris is closed. The lens is usually "pasted" to the inner surface of the lens capsule and sill respond but like that of course not as well. there have been a few improved designs tried with limited success. some have like a spring portion to enhance the effect of you muscles by moving the lens itself closer of farther away from the retina. My ophthalmologist(s) told me that these designs have been mostly abandoned now due to unreliability. What's more they can do nothing about presbyopia, "old eyes". this is when the muscles themselves have gone a bit stiff and are not as limber as they once were. In that case it owuld take some serious medical engineering to fix, and I would not ocunt on it lasting. Cataract surgery is not an absolute.It is much better than it was when my Great Aunt died on the table having the procedure, but it can still result in an inoperable condition, or one which might result in blindness if corrective surgery is attempted. My best recommendation is to get progressive lenses. They are used for normal people who become hyperopic due to presbyopia. Cataract operation or no cataract operation most have this condition. Even if the lens was a perfect replacement they would still have this problem. Many insurance plans will pay for ONE pair of glasses after such surgery. Use it wisely. First of all buy a bunch of reading glasses at the store and use them, figure out which ones work and work them for about a year, or a bit less if you have a time window. They might not pay after two years. During that time figure out your needs and when you get them paid for by insurance get the progressives. Personally I have 20/20 now for distance, but can't see the hand in front of my face. So I need progressives from zero to about +4.00 diopters. Right now I am getting by on a pair of beat up maybe 2.25s, I GUESS, and 3.25s. I will be buying a pair of +1.00s soon. I will wait until I get to that store where they are a buck. Hell if I need three of them I am not really hep to paying big bucks for them. That comes when the progressives come. Anyway, personally I am a bit reluctant to even get the progressives because I need two vitrectomies. What the hell happens to my vision (if any) then ? And that doesn't even address my retinal problems with dark and light. I thought the cataract was causing it, and now I think maybe the vitreous is is causing it but now I know of people, my Mother actually, who have actual retinal problems that simply are not going to respond to anything. If that is hereditary I am totally fucked in maybe ten years. So I have looked into it. If you can get a pair of glasses every year go get them now. If not, well how long has it been ? After six months your results should be good enough, but the longer you await the better. If you get them free every year who cares ? |
| N_Cook <diverse@tcp.co.uk>: Dec 15 11:00AM On 14/12/2018 22:55, Tim R wrote: > I don't do a lot of precision work like you all do, but right now threading a needle would be impossible. Reading glasses and a large monitor let me type, but I can't get smaller yet. > Before I had it done I was researching digital microscopes, but now I realize it doesn't matter how big something is on a screen if I can't focus on the screen. > How have you solved this? Some of you must be up around my age, perhaps even past it <g> Could you use a video projector to project the USB microscope image on a distant screen with 100 inch diagonal or whatever is optimal |
| Bill Gill <billnews2@cox.net>: Dec 15 08:05AM -0600 On 12/14/2018 4:55 PM, Tim R wrote: > I don't do a lot of precision work like you all do, but right now threading a needle would be impossible. Reading glasses and a large monitor let me type, but I can't get smaller yet. > Before I had it done I was researching digital microscopes, but now I realize it doesn't matter how big something is on a screen if I can't focus on the screen. > How have you solved this? Some of you must be up around my age, perhaps even past it <g> I have bifocals. The main lens has almost no correction, (the surgeon got the new lens almost right.) but the bifocal part is set right for reading. Then I have several pairs of drug store reading glasses for other uses. Since my computer screen is further than reading distance I have a pair for that. I have large personal library and find that I can see better when scanning the shelves with still another pair. For close work I have a pair of 10X binocular magnifiers. That is good for checking fine print. Bill |
| Mike Coon <gravity@mjcoon.plus.com>: Dec 15 02:25PM In article <6c3c5e15-0dba-459e-bfe9-76a895764449@googlegroups.com>, jfeng@my-deja.com says... > Of course, you can get prescription lasses from your optician. I wish I had known about that when I was in there a few days ago. Whether I could cope with such a lass is a different matter... Mike. |
| "jfeng@my-deja.com" <jfeng@my-deja.com>: Dec 15 07:41AM -0800 On Saturday, December 15, 2018 at 6:25:17 AM UTC-8, Mike Coon wrote: > I wish I had known about that when I was in there a few days ago. > Whether I could cope with such a lass is a different matter... > Mike. Most neerds suffer from lassiephobia, and benefit from the assistance of a trained professional. |
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