The Meme Box

The Real Jdbye · Dec 25, 2019

ThoD said:
Capacitors come in four quality levels, cheap, normal, extended and high (also called military-standard quality). Cheap is used in random knock-off devices and usually have expected lifespans of around a year (capacitor lifespan means that they last that long of total use, continuous or not, until they start swelling up, similar to how light bulbs claim to can last ~500 hours for example), normal lasts ~2.5 years and is the most common (used often in low-end GPUs since you aren't gonna be running a low-end PC 24/7 so doesn't matter), extended last ~5 years (used in pretty much all GPUs above 100$/€ since those see heavy use and finally high quality lasts roughly 10 years (only ever put in motherboards though since most people change GPUs while keeping the same motherboard so on GPU it would drive the price up for no good reason). Those are theoretical values though, could get lucky and get a capacitor that lasts much longer than it should or one that dies right away. But yup, heat is the single most important factor. My issue is that I run my PC ALMOST 24/7 and picked parts specifically with high-quality caps on purpose for longevity, so I never trust used parts since they won't last long when I use them.

Think mine are the 5 year ones and my desktop is still going 10 years later. I used to keep it on 24/7 as well. So they can easily outlive their rating.

ThoD · Dec 25, 2019

The Real Jdbye said:
Think mine are the 5 year ones and my desktop is still going 10 years later. I used to keep it on 24/7 as well. So they can easily outlive their rating.

They are just indicators, not literally "x time passed so it's dead", so yup, my PC is 7 years old now and run it 24/7 with at least 18 hours a day being at full load (encodings, high-end gaming, rendering, etc.).

Jiehfeng · Dec 25, 2019

(ps, it ain't so bad, a guy pointed out they necessarily aren't CRT's, the screens are not as viscious as a cathode light to your eyes.)

ThoD · Dec 25, 2019

Jiehfeng said:
View attachment 190988
(ps, it ain't so bad, a guy pointed out they necessarily aren't CRT's, the screens are not as viscious as a cathode light to your eyes.)

CRTs were the ones bad for your eyes and LCDs to some extend, BUT it's not just the light that can ruin your eyes, screens at the wrong distance damage your eyes' ability to focus (causing blurry vision) and VR headsets ALL have the screens too close for "realism". Normal distance is 2-2.5 times the diagonal size of the screen for reference.

Veho · Dec 25, 2019

ThoD said:
CRTs were the ones bad for your eyes and LCDs to some extend, BUT it's not just the light that can ruin your eyes, screens at the wrong distance damage your eyes' ability to focus (causing blurry vision) and VR headsets ALL have the screens too close for "realism". Normal distance is 2-2.5 times the diagonal size of the screen for reference.

Are you taking into the account the lenses that make the screens appear further? You have to fiddle with the focus on some models but the majority can set the screen's apparent distance to something comfortable.

ThoD · Dec 25, 2019

Veho said:
Are you taking into the account the lenses that make the screens appear further? You have to fiddle with the focus on some models but the majority can set the screen's apparent distance to something comfortable.

No, I mean that normally you have to keep the screen ~2 times as far as it's diagonal size (so 3" screens need to be at least 6" away), focus on the headset can make it seem like it's at the right distance, but it still damages your eyes.

Xzi · Dec 25, 2019

ThoD said:
focus on the headset can make it seem like it's at the right distance, but it still damages your eyes.

Seems like mostly superstition and guesswork, there's no evidence to support this as of right now. Blue light we know can be harmful, but that's filtered through the headset lenses when it comes to VR, double filtered if you wear glasses. The ability to focus on distant objects in VR comes down to setting your IPD correctly, and making things look "realistic" is all about having a higher resolution and refresh rate.

ThoD · Dec 25, 2019

Xzi said:
Seems like mostly superstition and guesswork, there's no evidence to support this as of right now. Blue light we know can be harmful, but that's filtered through the headset lenses when it comes to VR, double filtered if you wear glasses. The ability to focus on distant objects in VR comes down to setting your IPD correctly, and making things look "realistic" is all about having a higher resolution and refresh rate.

What are you talking about? There is evidence that having screens too close damages the eyes' focus, it's irrelevant to the light of the screen or how it works, it's a fact based on how the eye itself works! Humans can perceive vision in 3 dimensions like all predatory animals, so the eyes have the ability to bring things in and out of focus (eg: hold your finger in front of you and if you focus on it the background blurs while focusing on background makes the finger blur). Sitting too close to a screen or any object while directing your attention towards it for extended periods of time damages that particular function of the eye causing the eye to perpetually see things a bit more blurry than it should. This has been known, proven and even taught in biology for almost 200 years now (before screens even where a thing with other things people focused on). It's why you get eye strain (the burning feeling at the back of the eyes is from the blue light, strain is from focusing on a screen too close for too long). While sitting in front of a screen, if you are also looking around and whatnot instead of fully focusing on it, you won't really have adverse effects from this, but with VR headsets there's no taking your eyes off the screen if you look around, forcing you to always stay focused.

Xzi · Dec 25, 2019

ThoD said:
While sitting in front of a screen, if you are also looking around and whatnot instead of fully focusing on it, you won't really have adverse effects from this, but with VR headsets there's no taking your eyes off the screen if you look around, forcing you to always stay focused.

The current iteration on VR is too new for any long-term studies on this to be available. As far as I'm aware, the eyes and the brain don't interpret it in the same way they do when sitting close to other (flat) screens. It's far more similar to how you perceive things in the real world, where you can focus on distant or close objects. I can't speak for others, but I don't have an issue allowing my eyes to become unfocused in VR either. Not to mention most VR headsets have plenty of non-screen deadzone which keeps you anchored to reality (110 degrees FoV is pretty standard for PC headsets, whereas real-world human FoV is 200 degrees or more.)

Anecdotally I've been using VR since 2016, and I did already wear glasses, but there's been no change in my vision during the last few years.

ThoD · Dec 25, 2019

Xzi said:
The current iteration on VR is too new for any long-term studies on this to be available. As far as I'm aware, the eyes and the brain don't interpret it in the same way they do when sitting close to other (flat) screens. It's far more similar to how you perceive things in the real world, where you can focus on distant or close objects. I can't speak for others, but I don't have an issue allowing my eyes to become unfocused in VR either. Not to mention most VR headsets have plenty of non-screen deadzone which keeps you anchored to reality (110 degrees FoV is pretty standard for PC headsets, whereas real-world human FoV is 200 degrees or more.)

Anecdotally I've been using VR since 2016, and I did already wear glasses, but there's been no change in my vision during the last few years.

I'm talking about astigmatism (the medical condition), you are talking about blurry display...

Xzi · Dec 25, 2019

ThoD said:
I'm talking about astigmatism (the medical condition), you are talking about blurry display...

I know what you're talking about, and I'm saying there's no evidence for VR causing (or aggravating) astigmatism. Regardless of how low or high resolution it is. Eye strain in VR doesn't seem to be an issue for the vast majority of users, far more common is motion sickness (tied to inner ear balance) which forces shorter play sessions. I don't have either issue, though, and I have a high-end headset (Pimax 5K) which is crystal clear, so I'm able to play for 5-6 hours at a time without any discomfort.

Jiehfeng · Dec 26, 2019

Xzi said:
I know what you're talking about, and I'm saying there's no evidence for VR causing (or aggravating) astigmatism. Regardless of how low or high resolution it is. Eye strain in VR doesn't seem to be an issue for the vast majority of users, far more common is motion sickness (tied to inner ear balance) which forces shorter play sessions. I don't have either issue, though, and I have a high-end headset (Pimax 5K) which is crystal clear, so I'm able to play for 5-6 hours at a time without any discomfort.

In conclusion it's all about the mind at work here and how you go about using a VR headset, making sure you don't get used by the headset itself lol.

--------------------- MERGED ---------------------------

ThoD said:
What are you talking about? There is evidence that having screens too close damages the eyes' focus, it's irrelevant to the light of the screen or how it works, it's a fact based on how the eye itself works! Humans can perceive vision in 3 dimensions like all predatory animals, so the eyes have the ability to bring things in and out of focus (eg: hold your finger in front of you and if you focus on it the background blurs while focusing on background makes the finger blur). Sitting too close to a screen or any object while directing your attention towards it for extended periods of time damages that particular function of the eye causing the eye to perpetually see things a bit more blurry than it should. This has been known, proven and even taught in biology for almost 200 years now (before screens even where a thing with other things people focused on). It's why you get eye strain (the burning feeling at the back of the eyes is from the blue light, strain is from focusing on a screen too close for too long). While sitting in front of a screen, if you are also looking around and whatnot instead of fully focusing on it, you won't really have adverse effects from this, but with VR headsets there's no taking your eyes off the screen if you look around, forcing you to always stay focused.

That is probably your experience, may I give you a harmless experiment for your eyes?

Try this. Don't try to focus or unfocus your eyes, neither of the two. Just let the eyes be, be alert about the image projected in your conscious.

Keep focus on the whole "image", all of it at once. This is not a use of the eye muscles and nerves to focus on something, no. Drop those, and try to see everything at once. Once you get that, you will feel like your whole reality has become one, instead of individual reality per eye movement.

Now with this, your eyes will always be intelligent when it comes to meeting with "dangerous screens". Please try it. Remember, don't focus, just notice, or in other words, just "check", be as delicate as you can with this process. If there is even a little tension, then you are doing it wrong and using focus again, either focusing or unfocusing.

You will know it worked if you see in a new way for the first time, also try not to scoff before experimenting, hopefully you try it.

Oh, PS. This is not to be tried with VR, I'm talking irl. Try VR once you get this mastered if you catch my drift somehow.

ThoD · Dec 26, 2019

Jiehfeng said:
In conclusion it's all about the mind at work here and how you go about using a VR headset, making sure you don't get used by the headset itself lol.

--------------------- MERGED ---------------------------

That is probably your experience, may I give you a harmless experiment for your eyes?

Try this. Don't try to focus or unfocus your eyes, neither of the two. Just let the eyes be, be alert about the image projected in your conscious.

Keep focus on the whole "image", all of it at once. This is not a use of the eye muscles and nerves to focus on something, no. Drop those, and try to see everything at once. Once you get that, you will feel like your whole reality has become one, instead of individual reality per eye movement.

Now with this, your eyes will always be intelligent when it comes to meeting with "dangerous screens". Please try it. Remember, don't focus, just notice, or in other words, just "check", be as delicate as you can with this process. If there is even a little tension, then you are doing it wrong and using focus again, either focusing or unfocusing.

You will know it worked if you see in a new way for the first time, also try not to scoff before experimenting, hopefully you try it.

Oh, PS. This is not to be tried with VR, I'm talking irl. Try VR once you get this mastered if you catch my drift somehow.

The eyes BY THEMSELVES are always focused at whatever is in the middle of your vision, reason you have slower reactions to and often don't notice things in your peripheral vision, it's because they are out of focus and generally ignored by the brain. I'm not talking focusing with muscles or anything, the eyes will ALWAYS focus on something since it's how they work and if you want you can increase that focus temporarily (timespan of increased focus varies from person to person). It's why driving at high speed at night is tiring for example, it's because you increase your focus. I don't feel like explaining basic biology first thing in the morning having just woken up so just look up some medical journals and books on ophthalmology, you'll find TONS of useful knowledge (eg: how the eye literally can perceive ~1000 frames per second despite Ubisoft's "eye can only see 24FPS" and other cool info

).

Veho · Dec 26, 2019

ThoD · Dec 26, 2019

LIES!

emmauss · Dec 26, 2019

jt_1258 · Dec 26, 2019

What are the odds.

Veho · Dec 27, 2019

Veho · Dec 27, 2019

ThoD · Dec 27, 2019

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The One

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The man who cried "Ni".

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The man who cried "Ni".

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