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miripump

qb74
I'm aware of ppi studies but there's a subtype of eye strain related to accommodative lead. All common eyestrain interventions run opposite to this population, e.g the need for high blue light to stimulate and 'wake up' an insensate accommodative process. high ppi is like reading glasses that run counter to a myope's needs

I don't bother with performance based studies and subjective symptoms cause poor context. look at the shitshow in orthopedics

you can supersample windows to 4k on a low pixel density screen to still get the 'high ppi' visual information for high contrast frequency with low spatial frequency. none of these studies do that

could be the lower ppi

https://pmc.ncbi.nlm.nih.gov/articles/PMC9302673/

'Higher resolution devices showed a reduced lag of accommodation to the accommodative demand; however, this may cause a lead of accommodation in myopes for higher resolution display types.'

accommodative lead eyestrain is the worse type

have other more esoteric things but this is lowest hang fruit

jordan people in the past had eyestrain with filament bulbs and white paper due to red orange light. so much so that some print used long wavelength absorbing tint> odd how its now the opposite due to blue light misinformation

white paper diffuses light effectively which can strain. do white walls and concrete asphalt bother you too? micronized man made particles suppress specular reflection https://ktcolor.com/en/blog/kt-color-difference/ -- pigment researcher.

MagnuM

accom lead is like how you describe build up strain, not enough feedforward stimulation so you get tired from self driven feedback activity. like arch supports that feel good for 10 mins then you wanna rip it off causes it tires you out by blocking externally driven pronation\convergence of the foot

if you share your prescription i can help including your VT history

sorry cant edit

MagnuM

consider contacts at the computer since all glasses have plus at near due to lens thick at edges

MagnuM

if you do full time computer work you want your display to be very stimulating. so ccfl, cool cct with high blue light, high ppi, linear polarised light, monitor way above eye level tilted towards you etc. try turning your 2410 upside down to modify scan direction and strobe direction of the tubes

plus for accommodative lag

minus for accommodative lead

myopes are mostly the latter

photon78s

I don't have a link, it's not publicly mentioned. I am chinese and hear of it thru an athletics chat group. but many esoteric stuff happens in sporting academies all over the world not just here so I'm not surprised. But since learning of that I kind of noticed that sports grounds still lit by halides tend to be more energetic to play on but I am likely pushing it

this is partly why I'm very bearish about VR in general and its ability to generate immersion. they will probably figure this out in the VR space first before it trickles down to consumer electronics. I think we might see some kind of "downgrade" of sorts being charged as a premium feature. for example, the recent myopia control lenses actually introduces distortion, whereas expensive lenses were always marketed as being thin and distortion free as if it was some kind of health benefit. I don't really follow too much but the recent convex lenslet MLA OLEDS that collimate light for the purpose of changing nits might really start messing with peoples eyes. It's like traffic lights with fly eye lenses that are a very common visual complaint

I am not a big audio guy but the first time I heard dome mid ranges the sound was very present and extremely euphoric cause all I was used to were tiny full range cone computer speakers. I've heard about how slap echo and digital beepers and alarms that use tiny cone speakers to simulate high frequency noises tend to bother TBI patients the most due to the odd unnatural spatial effect. thanks for the link

jordan

At home I have CCFL laptop and monitors. for me I can tell a big difference between CCFL and LED. at first CCFL made my eyes tired but in a pleasant way like being in bright daylight but never once did it cause strain. which makes sense since something that has more accommodative stimulus will make your eyes work more in a good way. I can use my normal monitors at work ok but I guess I kind of noceboed and spoilt myself already

I had an issue with my first amoled samsung phone. I noticed I couldn't use it while driving, because my eyes couldn't switch focus from near to far as quickly, which is basically accommodative spasm induced blur. I checked my eyes and nothing changed so it was the phone.

I think filament is the best source of light because it has the smallest/tightest radiation pattern but the spectrum really is way too warm and can be bad as well. orange yellow light has a subtractive effect to blue light which can lead to premature cognitive decline. it's why I don't recommend blue blockers although everyone wants it by default on their glasses like it's some kind of luxury. maybe you can try some type of blue filter over the monitor or some glasses? B39 optical glass is good but it will be dim. blue filtered incandescent and halogen is a very pleasing and invigorating blue green color…

moonpie

it is an issue with the light produced. led diodes are a planar light source (look at the planar radiation pattern) that give off relatively more collimated rays which is unnatural compared to the sun and filament/hid sources that has more divergent rays. it's like listening to music through a cone shaped speaker driver vs. the actual waveform produced by an instrument. diverging vs converging echos etc.

the brain perceive objects illuminated by led's to be distant in space compared to HIDs and filament sources. same as how the brightly lit building a mile away is perceived to be distant despite it being brighter then the room you are in due to ray angle eccentricity. so light from leds don't stimulate accommodation at the eye as much (the more divergent the more stimulation, hence minus concave lenses) which leads to accommodative lead related eye strain. in other words, led light is actually too 'comfortable' for folks that have issues with accommodative insufficiency. the general population tends to have an issue with accommodative lag/excess hence they have no issues. there's a reason why optometry testing machines you rest your head on and look into still use filament sources.

we use computer monitors for eye testing in the optometric clinic and we noticed weird changes in our results when we changed from old dell CCFLs to newer led backlit monitors. eye movement was decreased and accommodative amplitude changed and the results were repeated when we A/Bed it.

flicker and spectrum is a red herring. filament bulb flicker too and your own blinking is low hertz flicker. daylight has tons of short wavelength content.

I think very soon the industry will pick up on this because folks in optometry and neuroscience already know about this. there is an indoor olympic track and field training center in china that downgraded their expensive LED setup to sulphur plasma. something about the brain the 'sensing the ground as being more present' which is pretty wacky but not really wacky since we already have tons of literature about how LRV of flooring affects gait.

personally I switched out my expensive optisolis leds in my home for cheapo CFL spirals and 12000k philip 'snow white' tubes and if anything the ambiance is superior. maybe that's why the corner store doesn't feel as chill since they swapped the overhead tubes for leds

madmozg
accommodative lead

too much feedforward activity because of lack of feedback stimulation

DisplaysShouldNotBeTVs

it's probably the shit auo TN viewing angles that makes it comfortable because it simulates positive spherical aberration where the center is brighter/in focus compared to the peripheral which allows the eye to generate micro saccadic motions to scan the entire screen rather then having to strain and move the eyes themselves which happens with a wide viewing angle IPS/OLED. the 'perfect viewing angles' makes you lose the contrast in depth between focal and peripheral. remember, concave and flat surfaces rarely exist in nature, the human face is spherical etc

I can tolerate the latest 540hz AUO TNs cause the viewing angle is so shit. I can also semi tolerate oleds if I wear a multifocal contact (coopervision misight) that has a pinhole design.

have you viewed a convex commercial display monitor in person before? it has the same effect but even better

ps: (Whereas on "bad" screens, it is painful to look at any part of the screen where there is "complex information-dense content" or a "large blurry/stretched/distorted image", and the "painful areas" actually change depending on the onscreen content. That LG IPS I was "initially optimistic about" failed because it had this issue). sounds like textbook accommodative lead where the person can only 'scan' rather then 'read' since the eyes are 'stuck' due to lack of light stimulus

you want high blue light when you're on CCFL, or stuff like HID lamp projectors

that's probably the last 20% for you. I mean there are papers from the 60s of people getting eyestrain when they work under sodium vapor lighting or dark rooms, or purposely induced eye strain in studies with amber filter sunglasses or reading on orange reddish print paper.

blue light is only a problem when its emitted by LEDs that have an unnatural polar radiation pattern (flat planar emittance). light in nature is either blackbody (the sun, candle, filament bulbs) or fluorescence (firefly, coral reefs, HID and CCFL) that have a diverging 360 degree radiation pattern from the source. blue light bends the most so its the most sensitive to directionality (see plus and minus lenses and chromatic aberration)

blue light is used to treat brain fog and fatigue and has been for a very long time. blue tinted glasses and irlen lenses, syntonics etc. osram and phillips made 8000/12000/16000k tubes to boost mood and productivity as well as stimulate cognition in the elderly. the reason they stopped is because they know it won't work as well with LEDs as well as the current narrative surrounding blue light

so crank up that blue light and stop wearing blockers and enjoy the CCFL. you're also likely someone who suffers from 'accommodative lead' related physical eyestrain. LED light doesn't stimulate accommodation well, which is the reason why phoropter machines for refraction all use halogen light sources. in fact LED light is actually relaxing for someone who has the opposite type of eye strain called 'accommodative lag'.

ps: feeling better when you're further from the screen means that the PPI is likely too low for you up close to stimulate accommodation (spatial frequency stimulates the eyes to focus). maybe try a smaller p2211h or even 12/15" laptops.

personally I use a custom CCFL thinkpad with modern parts, have a stockpile of AW2310's and use blue filtered halogen or 14/20k metal halides for general illumination to really get into the zone at my workstation

you can also try lowering the sharpness setting and also reducing the amount of red light in your custom RGB settings. if I'm not mistaken there's quite a large spike due to the type of red phosphors used