|
|
|
Thread Tools | Display Modes |
#11
|
|||
|
|||
reading glasses and computers
On May 20, 10:54*am, "Mike Dworetsky"
wrote: Ian wrote: On May 20, 7:48 am, "Mike Dworetsky" wrote: Ian wrote: I hate to say it, but my $5.00 pair of reading glasses from the pharmacy -- which are great for reading books -- just don't focus at my lap top screen which is about two and a half feet in front of me. You probably hold books closer than 2.5 feet. Get a slightly weaker pair just for computer screen use, so that the focus is at screen distance (usually further away than a book). My wife complained recently that her neck was aching. I watched her using the computer, and it was obvious that she was tilting her head back to use the varifocal reading segment. I told her to go to the opticians to get a pair of reading glasses optimised for computer work (they would know what to do in terms of diopter strength) and presto, that worked perfectly and she is a happy bunny now. The only downside is needing to carry two pairs of glasses instead of one. The diopter strength (as Steve Willner says) is the inverse focal length in metres. So what you need is probably something like the reading strength - 0.25. You are lucky if both eyes have the same prescription, mine sure don't. -- Mike Dworetsky (Remove pants sp*mbl*ck to reply) Thanks, I will try that. It is good to know, I will get some drugstore glasses as extra pairs, but I think I am read for a prescription set, too, adjusted for the computer because the drugstore glasses have plastic lenses, a little murky, I am ready to look through glass. The optician can also check you for astigmatism, which can cause blurred vision. *Even a little bit, that you might not notice every day because you are used to it, can be corrected and you may be surprised how much things improve. Modern spectacles are made with special shatterproof plastic, not glass, for safety reasons. *I don't find any problems with the quality of the lenses. -- Mike Dworetsky (Remove pants sp*mbl*ck to reply) It all started for me about two years ago. I noticed I had to hold the book further from me to read it. I normally hold a book about one foot from me. I found my eyes were focusing about two feet in front of me. I had been explained several years back that as we grow older the muscles in our eyes relax, and they focus the eye lens. So, as the muscles relax the lens is not as curved and thereby focuses further as we grow older. That is, we become more far sighted as we age. So I bought a pair of drugstore glasses and I was able to read fine again, but I found the computer screen was blurry with glasses. I then came to the conclusion that they focused at about a foot, maybe a foot and a half. I like to read in bed with the book up close to me. It came to pass that I tried some prescription glasses, and I felt they were clearer, less murky, but that could vary from pharmacy to pharmacy, even from glasses to glasses. I then decided I should get some prescription glasses -- and an examination -- which I probably haven't had in more than 20 years. I am under the impression that it will be a full examination -- so they should check for these astigmatisms you speak of. But I now see that I have to get two pairs, one for the diopter of the computer, the other for the diopter of reading a book. Of course after we pass through far sightedness, we come to develop a residue on one of the lenses in the eyes, and they then have to replace that with an artificial lens: cataract surgery. |
#12
|
|||
|
|||
reading glasses and computers
On May 20, 10:54*am, "Mike Dworetsky"
wrote: Ian wrote: On May 20, 7:48 am, "Mike Dworetsky" wrote: Ian wrote: I hate to say it, but my $5.00 pair of reading glasses from the pharmacy -- which are great for reading books -- just don't focus at my lap top screen which is about two and a half feet in front of me. You probably hold books closer than 2.5 feet. Get a slightly weaker pair just for computer screen use, so that the focus is at screen distance (usually further away than a book). My wife complained recently that her neck was aching. I watched her using the computer, and it was obvious that she was tilting her head back to use the varifocal reading segment. I told her to go to the opticians to get a pair of reading glasses optimised for computer work (they would know what to do in terms of diopter strength) and presto, that worked perfectly and she is a happy bunny now. The only downside is needing to carry two pairs of glasses instead of one. The diopter strength (as Steve Willner says) is the inverse focal length in metres. So what you need is probably something like the reading strength - 0.25. You are lucky if both eyes have the same prescription, mine sure don't. -- Mike Dworetsky (Remove pants sp*mbl*ck to reply) Thanks, I will try that. It is good to know, I will get some drugstore glasses as extra pairs, but I think I am read for a prescription set, too, adjusted for the computer because the drugstore glasses have plastic lenses, a little murky, I am ready to look through glass. The optician can also check you for astigmatism, which can cause blurred vision. *Even a little bit, that you might not notice every day because you are used to it, can be corrected and you may be surprised how much things improve. Modern spectacles are made with special shatterproof plastic, not glass, for safety reasons. *I don't find any problems with the quality of the lenses. -- Mike Dworetsky About two years ago I found I had to hold a book at near arms length to read it, I usually hold it up about a foot to a foot and a half. So I bought a pair of drugstore glasses and that worked great, but then my computer screen was blurry with the glasses. I had learned several years ago that as we grow older the muscles in the eyes relax, so the eye lens relaxes, thus making us become far sighted. After trying a pair of prescription glass, I thought they were clearer, less murky than drugstore glasses. I decided to get an examination -- and I am sure they will check for astigmatisms -- and now I know to get two pairs of glasses. Those with diopter for computer distance and those with diopter for book distance. The next phase we go through is one of the eye lenses builds up a residue, becomes foggy and that is when we have to get it replaced with an artificial one. Cataract surgery in other words. |
#13
|
|||
|
|||
reading glasses and computers
On May 20, 8:43*pm, Ian wrote:
On May 20, 10:54*am, "Mike Dworetsky" wrote: Ian wrote: On May 20, 7:48 am, "Mike Dworetsky" wrote: Ian wrote: I hate to say it, but my $5.00 pair of reading glasses from the pharmacy -- which are great for reading books -- just don't focus at my lap top screen which is about two and a half feet in front of me.. You probably hold books closer than 2.5 feet. Get a slightly weaker pair just for computer screen use, so that the focus is at screen distance (usually further away than a book). My wife complained recently that her neck was aching. I watched her using the computer, and it was obvious that she was tilting her head back to use the varifocal reading segment. I told her to go to the opticians to get a pair of reading glasses optimised for computer work (they would know what to do in terms of diopter strength) and presto, that worked perfectly and she is a happy bunny now. The only downside is needing to carry two pairs of glasses instead of one. The diopter strength (as Steve Willner says) is the inverse focal length in metres. So what you need is probably something like the reading strength - 0.25. You are lucky if both eyes have the same prescription, mine sure don't. -- Mike Dworetsky (Remove pants sp*mbl*ck to reply) Thanks, I will try that. It is good to know, I will get some drugstore glasses as extra pairs, but I think I am read for a prescription set, too, adjusted for the computer because the drugstore glasses have plastic lenses, a little murky, I am ready to look through glass. The optician can also check you for astigmatism, which can cause blurred vision. *Even a little bit, that you might not notice every day because you are used to it, can be corrected and you may be surprised how much things improve. Modern spectacles are made with special shatterproof plastic, not glass, for safety reasons. *I don't find any problems with the quality of the lenses. -- Mike Dworetsky About two years ago I found I had to hold a book at near arms length to read it, I usually hold it up about a foot to a foot and a half. So I bought a pair of drugstore glasses and that worked great, but then my computer screen was blurry with the glasses. I had learned several years ago that as we grow older the muscles in the eyes relax, so the eye lens relaxes, thus making us become far sighted. After trying a pair of prescription glass, I thought they were clearer, less murky than drugstore glasses. I decided to get an examination -- and I am sure they will check for astigmatisms -- and now I know to get two pairs of glasses. Those with diopter for computer distance and those with diopter for book distance. The next phase we go through is one of the eye lenses builds up a residue, becomes foggy and that is when we have to get it replaced with an artificial one. Cataract surgery in other words. Sorry I posted that story twice, I thought it did not post the first time. |
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Help with glasses! | Steve & Lizzie | Amateur Astronomy | 9 | September 21st 06 09:00 PM |
3d glasses | Bluesky | UK Astronomy | 5 | June 16th 04 04:15 PM |
Eclipse Glasses | Lloyd Jones | Misc | 23 | June 6th 04 12:35 PM |
USA Needs Glasses | BobZ | Amateur Astronomy | 20 | September 12th 03 12:09 PM |