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Northmount

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Everything posted by Northmount

  1. That didn't happen with mine. It might depend on whether the cataract is on the back of the lens, or front of the lens, or on the cornea. Of course if it is on the cornea, they do a corneal transplant. Another thing that causes star effects around bright lights is deterioration of the coatings on your glasses lens. My wife has special high refractive index lenses with a special coating to further improve the refractive index, plus the other non-reflective and scratch resistant coatings. Over a period of 3 to 5 years, the coatings breakdown and craze. With any vision problem, as soon as you see the change or a problem develops, go get your eyes checked to see what the cause is. In some cases, the problem needs to be diagnosed and repaired immediately. Other problems are not an emergency. Your Dr is the one that can figure it out and help you either maintain or improve your vision. Tom
  2. Also check your eyes' behavior individually. Cataracts may occur in one eye long before the other. Your brain selects the best eye automatically, so you often don't realize that one eye has a problem. Another symptom that may occur is when looking towards a brightness, like a bright window, everything in the foreground turns to dark shadows. Again, check each eye separately. The Dr had an eye chart on an bright outside window and had me stand in a shadow. With my right eye, the eye chart was just a dark shadow. With my left eye, I could see and read the eye chart. I was very surprised! He scheduled me for cataract surgery within 2 weeks. Had both eyes done at the same time so wouldn't have to have glasses for one, but not for the other. Another thing that is a warning for vision problems is if you suddenly have problems with being able to quickly check the side rear view mirrors. If you can't seem to focus quickly, you need to find out why. Good chance one of your eyes has deteriorated to the point that it is almost useless, less than 40% vision. These comments I have been making are from my experiences over the past 4 years. Hope they are of use to others so they can get the help that they need. Tom
  3. @Cymro29k3 moved your post to leather sewing machines. You'll get more contact with the gurus here. Tom
  4. And you will still need reading glasses. There are specialized lens implants that supposedly allow both close and distant vision. The lenses have circular rings and you have to retrain your eye movements to seek the image you want to see. From what I understand, you have 2 images projected on your retina and have to learn how to select the one you want. The images may not be as clear as glasses designed for specific uses. I know a fellow that was tired of wearing glasses all the time and had implants like this. He seems happy with them, but does have trouble at times with the image not being really clear. Seems to do okay with night driving too. I also know a lady that just had implants due to high level of astigmatism that could no longer be corrected with glasses. It's been a couple months and she is still having trouble adapting to them. Apparently her astigmatism is due to shape of her eye rather than being due to her natural lens. You need to ask lots of questions of your surgeon and get references from other users to see what type of implant will work for you. I wasn't given that type of information and have the standard low cost implants. And not too excited about having them replaced either, so will cope with wearing different glasses for different applications. Tom
  5. Also 2 others available at https://www.abebooks.com/servlet/SearchResults?sts=t&an=+W.C+Double+&tn=Design+and+construction+of+handbags&kn=&isbn=&sortby=96 Tom
  6. Try them on while you are there and pick what works for the distance you want to work at. Tom
  7. Long past! Have to wait for them to come around again someday! Tom
  8. Definitely. When you look at how lenses and the iris work together, it shows the need for a well lit workspace, at least for the object you are working on. In photography, one of the things you learn is about depth of field. That is how much of the scene is in focus measured from the front of the lens. A large depth of field puts more of the scene in focus. If you were taking a portrait outside, you could have the persons face in focus, but the foreground and background out of focus. This is a shallow depth of field. To get the largest depth of field, there needs to be lots of light, and a small iris/aperture opening. The same is true for your eyes. Lots of light causes your iris to narrow, increasing the depth of field, and putting more of the object you are working with in focus. This is even more important to people like me that have had cataract surgery. My eyes' lenses cannot adjust since the lenses are fixed. The eye muscles cannot adjust the lens. So a brightly lit workspace improves what I can see clearly due to the improvement in the depth of field. Just make sure the lights you use don't shine in your eyes or make glare that masks what you are trying to see. Use lighting that comes from both sides to minimize shadows caused by your hands and tools. Hard to follow a line when it is masked by a shadow! Tom
  9. As aven said above, it is important to have your optometrist or ophthalmologist measure to get the 'split' lines in the correct place so they work for you, and so you don't develop neck and shoulder problems due to the way you have to hold your head to be able to see clearly.
  10. I've been told the best prescription for glasses is to not be perfect, but to make the eyes work a bit at seeing clearly. When fitted for perfect, the eyes seem to not work as hard, and you go into new stronger lenses sooner. (That's assuming you have not had your natural lens replaced with an acrylic lens like for cataract surgery. Tom
  11. Progressive or varifocal lenses have a much narrower field of view than bifocals or single vision. If not prescribed and designed correctly, it is like you are looking down a tunnel. I've been working through this the past few months after cataract surgery where the natural lens is replaced with an acrylic lens. You go from being able to focus your eyes to being like an old fixed focus box camera. I was very near sighted. Now I have 20/20 and 20/25 vision. But, my focus distance is like the box camera, everything is in focus from 4' to infinity. Hard to read the newspaper without 4' long arms! So I have to have reading glasses. I found a pair that are like progressive lenses good for reading, computer, and out to about 4' so basically 3 zones of view. (Cheap from China, about $45 CAN.) I have since then gone after progressive lenses that would let me work from about 5" out to infinity. But that is too high a gradient to work into the lens. For progressive lenses, there are what they call soft lenses and hard lenses. Nothing to do with the material they are made of, but deals with the width of your field of vision. Hard lenses have a narrow field width; soft has a wider field width. The first pair were hard, and along with that high gradient were not really useful. The next pair were still hard (lab error!), but from about 14" to infinity. But still like a tunnel. Just got another pair today, soft this time. They are better, but not like my vision used to be, and of course not useful at close distances, like tooling, stamping, and threading a needle. Most of you are familiar to some extent with what a bell curve looks like. Hard lenses have a high peak, and narrow steep sides. Soft lenses have a wide peak, not as high, and flatter slope on the sides. So soft helps me to see better, not as narrow a tunnel, but still not like my vision used to be. If you can, I would suggest a pair of bifocals that are for reading distance and for your computer distance, as long as you have your natural lenses in your eyes. That is what I worked with for years in an engineering office, and they worked very well. I could see the dual monitors and my whole desk, all in focus. I had executive cut lenses. The line between reading and computer runs all the way across the width of the lens. Gives a very wide field of view in comparison to 'normal' bifocals and much better than progressive lenses. For those that are far-sighted, I think these would work as well, but I don't have that experience. One of my problems is to re-train my brain. It used to be move closer to see better. Now it is the opposite, move further away to see more clearly. Hard to get used to that. For closeup work, I will need to use a magnifying light from time to time. Hope this info is of some use to you who are dealing with vision problems. Just as an aside, about 3 years ago, I was sitting behind a person, listening to a speaker. Every time the person in front of me moved her head to the right, the image I saw of the speaker suddenly went to being a dark shadow over a lighter shadow background. It got me pretty concerned! I got into see a retinal surgeon within a few days. He determined that I had scar tissue over the retina. Said my vision was at 40%. I felt like it was more like 10%. He removed the vitreous humor from my eye, scraped the scar tissue off, and refilled my eye with silicon oil. And my vision came back quite well, but due to the now irregular surface of the retina, lines are not straight! It did get rid of the floaters in my eye which is great. I had noticed about 30 years before that my right eye didn't see white, it was sort of a cream colour. No one could tell me why. Now my right eye sees white the same as my left eye. So if you notice something like that, go get it checked and tell them about my experience. No one knows why the scar tissue developed. Tom
  12. OP appears to be in the Denver CO area. Guest Howard, I deleted the second thread same subject. Requests in Help Wanted require approval before they can be seen. No need to double post. Tom
  13. Tell people where you are located so they can give you info for your area of the world. Update your profile with your location. Tom
  14. I think the beveling on the point of leaf on the left looks fine. On the top right there is a little glitch where the beveling needs touched up. Like the whole appearance. Good job with the bar grounding. Tom
  15. I'm pleased that I could help. Your site looks great! Tom
  16. @Bender Moved your post to Leather Sewing Machines. You'll get more responses here. Tom
  17. @OLDNSLOW According to marketplace rules, you should be listing prices, shipping etc. for all items listed for sale. Tom
  18. @OLDNSLOW Reduce your file sizes and you can post lots of photos in the same post. 800 x 600 pixels is adequate and usually results in a file size of less than 5K. Tom
  19. Heavy duty sewing machines are not leather sewing machines. They may be suitable for garment and other thin leathers. See this post Tom
  20. @Rockoboy See above post for a Youtube Link. Hopefully that will work for you. Tom
  21. Edit is only open for a limited period of time. Just add photos in a new post to this same thread. Tom
  22. Use a curved needle. Keep your awl perpendicular to the leather surface. Use a piece of pipe or bar stock clamped in a vice for your anvil, or use an anvil with a horn that is forged as part of the anvil. I see from your IP address that you are in Excelsior, Minnesota, 55331 so should have access to a Tandy store (or others you can visit or web order from. Tandy has brass rivets with burs, #12 x 3/4" long. You might like to add your location to your profile so people know what part of the world you live in and can give you meaningful help for your part of the globe. Tom
  23. @TonySFLDLTHR Can you post this on your Youtube channel and provide a link to it? Tom
  24. Looks like it was shared on Facebook. If you use Facebook, try logging in to it and see if it works for you then. What kind of error or message do you get when you try to view it? Tom
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