Will vision deteriorate if you use a projector instead of a monitor (if at all, and how much slower)?

Question

Monitors

Everyone knows that working in IT requires long sittings at the computer screen. Sooner or later, the vision of a computer scientist begins to fall (this also includes designers and artists who use computers in their work). So: what if you use a projector instead of a monitor? Will it damage your eyesight? If all the same it will deteriorate, then how much slower than when using a conventional monitor?

Answer 1

As far as I know, in addition to flickering and an excess of blue in the spectrum, brightness, contrast and clarity affect fatigue (and, as a result, eye strain). It is clear that there should be no flicker, blue should be normal, and contrast and clarity should be high.
But the brightness should match the background lighting. That is, if you bring a white sheet of paper to the monitor and display white color on the monitor, then they should have approximately the same brightness. This is not possible with a projector. Either the brightness is too high or the contrast is too low.
Flickering in projectors can also be. If this is a DLP projector, then it flickers, because the technology is like that. If LCD, then it depends on the backlight. The LED light can flicker just like on the monitor. If the backlight is on a metal halide lamp, then it does not flicker, but you will have to change such lamps every year, or even more often. Monitors are also not flickering. See reviews -=DEAD=- and on overclockers.ru. There you can also find the severity of the crystalline effect, which is very tiring for some.
The clarity and contrast of a projector cannot be compared to a monitor. They are highly dependent on optics, screen and lighting levels. But in general, the projector will be worse.
The level of blue also depends on the backlight. See above.
Total. The projector has only one advantage over the monitor - it can be moved further away. But a normal large diagonal monitor will also cope with this. Enough monitor 27-30 inches, and move it a meter away from the eyes. Then the clarity will be high, and the distance will not contribute to the development of myopia.

Answer 2

If you take small breaks and do not sit close to the monitor, then everything will be fine.
As for the difference between a projector and a monitor, there is not much difference. Old tubular monitors used to cause damage to vision, but modern LCD monitors do not carry much harm.
Actually, if you dig deeper into the essence of the problem, it is not the monitor itself that causes damage to vision (we are talking about modern ones), but the load on the eyes that a person creates during work. It can be anything, reading a book, working at a computer, anything else. If you are close to the monitor - myopia will develop. Similarly, if you continuously look at one point, vision can also be lost (and a headache may also appear, which is not uncommon).
Personally, I see the advantage of the projector only in the fact that the image can be made many times larger, sit further away and enjoy a large, pleasant picture.