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Medical Forum / General / Vision / July 2006Computer Monitors.
Is it true that flat monitors are safer for the eyes than regular CRT monitors? I do not notice any difference and I have used both. Thanks Edgardo Barbosa >Is it true that flat monitors are safer for the eyes than regular CRT >monitors? I do not notice any difference and I have used both. In what way safer? I'm going to get a glass fronted TFT monitor at work. Can't wait to see what it's like. Ann >>Is it true that flat monitors are safer for the eyes than regular CRT >>monitors? I do not notice any difference and I have used both. [quoted text clipped - 3 lines] > I'm going to get a glass fronted TFT monitor at work. Can't wait to > see what it's like. Fragile?  SignatureDie dulci fruere, Nicolaas. ... Sometimes we need to laugh at ourselves so the people who are laughing at us don't feel too embarrassed. >>>Is it true that flat monitors are safer for the eyes than regular CRT >>>monitors? I do not notice any difference and I have used both. [quoted text clipped - 5 lines] > >Fragile? I don't see why it would be any more fragile than a CRT. Just less of a footprint. Ann >>>>Is it true that flat monitors are safer for the eyes than regular CRT >>>>monitors? I do not notice any difference and I have used both. [quoted text clipped - 10 lines] > > Ann The front of a CRT is a good 20mm or more thick. How thick is the glass front of a TFT monitor? SignatureDie dulci fruere, Nicolaas. ... Our wishes lengthen as our sun declines. > The front of a CRT is a good 20mm or more thick. How thick is the glass > front of a TFT monitor? Man, you have some kind of bullet proof CRT? >> The front of a CRT is a good 20mm or more thick. How thick is the glass >> front of a TFT monitor? > Man, you have some kind of bullet proof CRT? There's a tempered glass "lens" outside the tube, on most TVs and monitors. I think he's seeing the gap between the lens and the phosphor face. Once I tipped over a 36-inch Sony TV - it fell about 18 inches, face first onto a hardwood floor. Damn thing didn't break, didn't show any damage except some color distortion that wiped away with a degausser. -MT >> The front of a CRT is a good 20mm or more thick. How thick is the glass >> front of a TFT monitor? > > Man, you have some kind of bullet proof CRT? No, not at all, William. The face of a cathode ray tube is the heaviest and thickest part of its glass envelope. The CRT operates at high vacuum and there can be in excess of 30,000 volts floating around inside - resulting in the generation of x-rays. Hence, the front of a CRT is very thick lead glass both for strength (think what would happen if its integrity were breached - ever heard of an implosion? NOT pretty, except maybe pretty lethal) and for the protection (from radiation) of the viewer. That is why they are so bloody heavy. SignatureDie dulci fruere, Nicolaas. ... A well informed man is one who shares your views >>> The front of a CRT is a good 20mm or more thick. How >>> thick is the glass front of a TFT monitor? [quoted text clipped - 11 lines] > and for the protection (from radiation) of the viewer. > That is why they are so bloody heavy. Not usually lethal... When I was a kid we used to bust old TV tubes to hear them pop and implode. -Quick >>>> The front of a CRT is a good 20mm or more thick. How >>>> thick is the glass front of a TFT monitor? [quoted text clipped - 16 lines] > > -Quick I'd bet you broke them at the weakest point 0 the junction of the neck and the flare. That's comparitively tame. Try putting a hammer (you'll need a BIG one - like 4lb!) through the front face and see what happens. On second thoughts - don't! They aren't made thick, heavy and tough without good reason, Quick. SignatureDie dulci fruere, Nicolaas. ... Why didn't Noah swat those two mosquitoes? >> The front of a CRT is a good 20mm or more thick. How thick is the glass >> front of a TFT monitor? > > Man, you have some kind of bullet proof CRT? No, not really. That's not an uncommon thickness. When my husband was a kid he tried to bash the front of a TV picture tube in with a shovel. He ultimately stood back and threw a rock at the neck, with entertaining and frightening results. As adults we tipped a picture tube into a BIG dumpster. A most satisfactory WHOOOOOMP! and a shower of crap shooting up into the air. Hey kids, don't try this at home... SignatureCheers, Bev ======================================================================= "Lord, grant me the serenity to accept the things that I cannot change, the courage to change the things I can, and the wisdom to hide the bodies of the people who pissed me off." >>>>>Is it true that flat monitors are safer for the eyes than regular CRT >>>>>monitors? I do not notice any difference and I have used both. [quoted text clipped - 13 lines] >The front of a CRT is a good 20mm or more thick. How thick is the glass >front of a TFT monitor? I don't know but this one http://www.lowestonweb.com/Products/DisplayInfoMain.asp?e=B1E49780-9E14-4699-9FC 1-069D189C548F is advertised as being ideal for the education, corporate and high use marketplace. Gotta love those phrases! Just wish they'd buy the bloody thing. Of course they have to source their own which will cost twice as much as that one and take several times as long to be delivered. Ann > > Is it true that flat monitors are safer for the eyes than regular > > CRT monitors? I do not notice any difference and I have used both. > > In what way safer? Ever tried to pick up a 21" CRT? You can hurt yourself. Seriously though, it seems that the lack of scan/flicker on a LCD might be beneficial in terms of eye strain. Plus, I've read that the lack of sharply defned edges on computer screen characters messes with the accomodation system a little. And this would be less of an effect with LCD too. >>> Is it true that flat monitors are safer for the eyes >>> than regular CRT monitors? I do not notice any [quoted text clipped - 10 lines] > system a little. And this would be less of an effect > with LCD too. The OP may be referring to either CRT or LCD monitors. New CRTs are usually flat screened instead of a curved front surface. People also seem to refer to LCD monitors as flat screens (they are) as well. Scan/flicker is not discernable above about a 75hz scan rate. The way to tell if you can see it is to look away from the screen, keeping it in your peripheral vision and see if you can notice the flicker. CRTs scan constantly with the beam exciting the phosphors(sp?). LCDs only flip the crystals when the data changes. For fast motion, like in heavy duty gaming, CRTs (high end) are still superior. It takes a bit longer to flip the LCD crystals and can result in a perceptable "trail" effect. Sharpness of character edges is a function of the resolution and distance between pixels. A high res CRT will give sharper character edges than a lower res LCD (same size screen and characters). -Quick >> <ebarbosa2@adelphia.net> wrote: >> [quoted text clipped - 4 lines] > > Ever tried to pick up a 21" CRT? You can hurt yourself. Wuss! Just gotta use your legs instead of your back. Or so I would guess. Heaviest I've carried is 19". > Seriously though, it seems that the lack of scan/flicker on a LCD might > be beneficial in terms of eye strain. Plus, I've read that the lack of > sharply defned edges on computer screen characters messes with the > accomodation system a little. And this would be less of an effect with > LCD too. I've been using CRT monitors since 1978; since 1990 usage averages 8 hours a day (just a guess). Current monitor is 1600x1200. I have no idea what eyestrain is. SignatureCheers, Bev $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ Don't tax me. Don't tax thee. Tax that man behind the tree. > Wuss! Just gotta use your legs instead of your back. Or so I would > guess. Heaviest I've carried is 19". A 21" monitor with a Trinitron tube weighs about twice as much as a non-Trinitron 19". Until LCD screens reach at least 2048x1536 resolution, Ill stick with my NEC 22" pure flat CRT. I bought mine a couple of years back prior having lasik, thinking worse case I could run 640x480 if lasik didn't go well. High end CRT's are still the choice of most professionals involved with high end CAD and imaging. Even hardcore gamers still prefer CRTs due to the smearing effect that a LCD typically exhibits. LCDs are getting better but can't equal the resolution or refresh rates provided by a CRT. Size and weight are the only major drawback of CRT technology. > > Wuss! Just gotta use your legs instead of your back. Or so I would > > guess. Heaviest I've carried is 19". > > A 21" monitor with a Trinitron tube weighs about twice as much as a > non-Trinitron 19". > High end CRT's are still the choice of most professionals involved with high > end CAD and imaging. Furthermore, the price is right (free if you know where to look). (the dump, for instance) -- Dicky (not claiming to be a Professional) I agree, there are some great bargins on some fantastic CRT monitors out there. I picked my 22" CRT "off lease" at tiger direct for about $50, after rebate. I went in planning to buy an 19 or 20" lcd, but after seeing the picture quality of a high end CRT compaired side by side with the LCDs I couldn't pass it up. >"Dick Adams" <bad.addr@nonexist.com> wrote in message news:nqMsg.6251$F8.1504@trnddc02... >> High end CRT's are still the choice of most professionals involved with high >> end CAD and imaging. > >Furthermore, the price is right (free if you know where to look). |
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