What's the difference between the LCD and the old ones monitor?How fast does the computer spoil our eyes?

Question

I would like to know the difference between the LCD monitor and the old ones,then i'm wondering if my eyes will be spoiled by computer cause i spend sometimes in computers,if so how fast can it spoil my eyes??

Answer 1

Flatscreens and LCDs certainly do provide a clearer picture, and I do prefer to use them over CRTs except when using my 3D goggles which only work on CRT monitors. If you plan on watching a lot of movies or playing games on your computer, then an LCD is worthwhile, purely for the quality of picture.

Generally, computer use will NOT affect your eyes. I've been staring into a computer screen for the better part of hmm... about 700,000 hours over 12 years. Probably a lot more, definitely not any less.

Most of that screen time was spent in front of CRT monitors. I only started to experience problems with reading about 2 years ago. My optomitrist says this was more due to having a lazy eye as a child that wasn't picked up. I now use glasses for reading books but can get by fine without them normally. If it were true that my eyesight had been affected by CRT use, then I would expect my dominant eye to be just as, or more, troubled as my non-dominant eye. However I still maintain perfect vision in that dominant eye, even though I use both to look at a screen. Eye problems run in my family, so all things considered, I don't think there's much of a correlation.

I know people who've spent just as long in front of computers as I have and they can see perfectly, if not better than most. Skin is also unaffected, but can get a bit blotchy if you stay up all night on the computer... as it will if you stay up all night doing anything else.
The other thing that makes me suspicious of CRTs causing eye problems is that when you use a computer your eyes get a good work out, reading small print, large print, looking here looking there.

If you're concerned about eye strain, try turning down the glare on your monitor (brightness or gamma) and switch to a less goudy colour scheme (ie no bold reds and contrasting greens). If you are further concerned, try doing simple eye exercises such as focusing on your finger close in and then far out, with each eye, one at a time.

Answer 2

Old monitors are like small TV sets. They use Cathode Tube (CRT). The front of the tube (the other side of the glass screen surface you see) is covered with spesial fluoresence substance that would light up with different colors (Red Green Blue or RGB)when shot with light rays. That's how it works, the signal input controls when and where (XY coordinate) the light should shoot. As the result, the color lit up, and you see image. Now all of electronic gadgets have radiation. Most of them are to small to damage people. The problem is, as with TV set, the light ray on CRTs are very powerful, and it radiates radiation ray. That's why TVs have recommended safe distance that's usually 5 x screen size. So for 14", the safe distance is 5x14" = 70". Problem is when we're working on computers, we usually gets pretty close to the monitor so the radiation is huge, and spoils your eyes quckly. If you want to lessen the risk, try putting the monitor horizontally or angled, not frontal. The most harmful radiation, the gamma ray, emits horizontally right into your eyes when you see it frontal, so if you put your monitor horizontally, you avoid the most harmful radiation from emiting right into your eyes.
LCD (Liquid Crystal Display) has a completely different mechanism. The screen is made of a thin bag consist of spesial liquid crystal. These crystal will light up with differrent colors when given electric current. By controlling the current, we control when and where the crystal should light up, thus creating image. Thats why LCDs are much thinner than TV or old monitors, because they do not have cathode ray tube in it. The radiation is very much smaller, but doesn't mean that it's zero radiation. So our eyes would eventually gets damaged by the radiation from TV or old monitor or LCD. The differrence is the time it takes for our eyes to get damaged.
Hope not too long, got a little carried away :)

Answer 3

Well it just depends but here are some facts (I work @ best Buy) 1) There are different picture qualities avalible 1080i is considered better than 720i because there are more pixles that make up the picture 2) There are LCD Plasma TVs which are better (in my opinion) than just a plain plasma or LCD 3) Yes HD tv does make a HUGE difference because the show is actually shot with a High Definition Camera, meaing that again there are more pixles 4) I recomend getting direct tv I just swiched to it from Dish Network and there are a LOT more shows avalible in HD (not just sports either) Desterate Housewives, an a lot of other shows are also brodcast in HD on Direct TV.

Answer 4

LCD is an acronym for Liquid Crystal Display. An LCD panel is a translucent glass panel that shows a computer or video image using a matrix of tiny liquid crystal displays, each creating one pixel ("picture element," or dot) that makes up the image. Used with an overhead projector for a light source, an LCD panel can make an effective computer projection device, however LCD projectors have become a more economical choice. "LCD panel" also refers to the smaller panels used internally in today's LCD video projectors.

CRT is an acronym for cathode-ray tube. It is most familiar to us as what we call a picture tube in our television sets. A standard television set uses one CRT with a special mask inside that allows for small dots or lines of the colors red, green and blue to make up a color image. A 3-tube or 3-CRT projector uses 3 separate CRTs, one for each color. A basic CRT is comprised of a cathode-ray in the neck of the tube and a phosphor coated glass at the front of the tube. The cathode-ray shoots a beam of electrons which strikes the phosphors on the front glass causing them to emit visible light.

CRT projectors provide better results if you'll project from computers with more than one resolution. An LCD projector will give its best results only when your computer output exactly matches the stated resolution of the LCD, but that's not a limitiation of CRTs. CRTs provide better video, because they offer better color and grayscale accuracy. Though they are not as bright overall as LCD projectors, if you can light your room properly, CRTs offer a much better range of brightnesses from highlights to shadows. This is the reason they appear to be as bright or brighter than many LCDs, even though the specs suggest otherwise.

As for me, my eyes get tired with CTR monitors, but CTR monitors are better for work with graphics.