“Before I start, I am not in any way affiliated with this company, I'm just a customer who chanced upon the product.I have eyes that do not like bright lights especially blue light. Signs and text that are lit blue at a distance appear as a blur to me (worse if the source light is an LED) while all other colours appear very sharp (I do not require prescription lenses to see clearly at any distance although a very mild correction does perceivably benefit me at all distances.)When the world shifted from CCFL (fluourescent backlit with UV (invisible) source light) to LED backlighting (blue LED with a yellow phosphor to absorb that blue light and fluouresce yellow) I found myself with unbearable eye fatigue whenever looking at a white LED backlit display of any kind.Some research later I discovered that is because the white light emitted by white LEDs is the product of a mix of blue and yellow photons only, it is not a full spectrum white like sunlight or RGB light, it has a massive spike of blue light in the 450nm wavelength and dropping off sharply but still present either side of that. This is the exact point of the visible spectrum that causes people with weak eyes like me to experience fatigue when we expose our retinas to that short wavelength of light due to its high energy.Other display technologies such as OLED/AMOLED have base light sources of a mix of red, green and blue LEDs in order to produce white, this results in a balanced and less optically obnoxious white that my eyes (and i'm sure many others) have a much easier time dealing with. (there is the PWM issue with OLEDs but I won't cover that here as it is not relevant)Why not just always use old CCFL monitors, and OLED devices and non white LED backlit displays then? In today's world that is impossible, the majority of displays we interact with on a daily bases are lit by white LEDs and produce other colours purely by filtration of that light, therefore the harsh light must be attenuated or avoided entirely for me if I want to keep my eyes in good health.Night modes on displays apply filtration to the base light, yes they can make your screen go all warm and amber by bathing the image in warm colours, but it does not and cannot stop a bunch of those blue photons from hammering into your eyes as the material in an LCD allows them to pass freely (it has to in order to display colours accurately).This product, I cannot tell you to what precision it attenuates the light, but it objectively does so. I can view my iphone 8's display which used to fatigue my eyes in a matter of a few minutes of use for normal use now without feeling that anywhere near as much. It was worth the money for me it has turned reliance on OLED mobile devices into that potentially not being the case.The only negatives I can state are definitely par for the course with this product, inherent to it's purpose and should not be regarded as flaws. They are as follows.Blue/Mauve tint to the device screen when tilted any direction but straight at you.Slight (and I do mean slight, slighter than night shift on less than a quarter of the way) yellow tint to the image, the marketing material stating that it doesn't affect the image at all is not 100% accurate (I expected this).Overall, good work on creating a product to address this issue, while I believe the general population does not experience fatigue to the point of going out and seeking a product like this, I do believe they could benefit from its use.”

Helpful Report

Posted 4 years ago

“Before I start, I am not in any way affiliated with this company, I'm just a customer who chanced upon the product.I have eyes that do not like bright lights especially blue light. Signs and text that are lit blue at a distance appear as a blur to me (worse if the source light is an LED) while all other colours appear very sharp (I do not require prescription lenses to see clearly at any distance although a very mild correction does perceivably benefit me at all distances.)When the world shifted from CCFL (fluourescent backlit with UV (invisible) source light) to LED backlighting (blue LED with a yellow phosphor to absorb that blue light and fluouresce yellow) I found myself with unbearable eye fatigue whenever looking at a white LED backlit display of any kind.Some research later I discovered that is because the white light emitted by white LEDs is the product of a mix of blue and yellow photons only, it is not a full spectrum white like sunlight or RGB light, it has a massive spike of blue light in the 450nm wavelength and dropping off sharply but still present either side of that. This is the exact point of the visible spectrum that causes people with weak eyes like me to experience fatigue when we expose our retinas to that short wavelength of light due to its high energy.Other display technologies such as OLED/AMOLED have base light sources of a mix of red, green and blue LEDs in order to produce white, this results in a balanced and less optically obnoxious white that my eyes (and i'm sure many others) have a much easier time dealing with. (there is the PWM issue with OLEDs but I won't cover that here as it is not relevant)Why not just always use old CCFL monitors, and OLED devices and non white LED backlit displays then? In today's world that is impossible, the majority of displays we interact with on a daily bases are lit by white LEDs and produce other colours purely by filtration of that light, therefore the harsh light must be attenuated or avoided entirely for me if I want to keep my eyes in good health.Night modes on displays apply filtration to the base light, yes they can make your screen go all warm and amber by bathing the image in warm colours, but it does not and cannot stop a bunch of those blue photons from hammering into your eyes as the material in an LCD allows them to pass freely (it has to in order to display colours accurately).This product, I cannot tell you to what precision it attenuates the light, but it objectively does so. I can view my iphone 8's display which used to fatigue my eyes in a matter of a few minutes of use for normal use now without feeling that anywhere near as much. It was worth the money for me it has turned reliance on OLED mobile devices into that potentially not being the case.The only negatives I can state are definitely par for the course with this product, inherent to it's purpose and should not be regarded as flaws. They are as follows.Blue/Mauve tint to the device screen when tilted any direction but straight at you.Slight (and I do mean slight, slighter than night shift on less than a quarter of the way) yellow tint to the image, the marketing material stating that it doesn't affect the image at all is not 100% accurate (I expected this).Overall, good work on creating a product to address this issue, while I believe the general population does not experience fatigue to the point of going out and seeking a product like this, I do believe they could benefit from its use.”

Helpful Report

Posted 4 years ago

“Very easy to apply and install. Did change how my colors appear on the screen. Hopefully it will help with my headaches!”

Helpful Report

Posted 4 years ago

“Great blue light blocker”

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Posted 4 years ago

“Very good quality and it works :+1:”

Helpful Report

Posted 4 years ago

“I’m writing this review through my new Ocushield blue light filter. My eyes feel a lot less “stressed.” I have a diagnosed macular degeneration of my eyes, and I have these filters for my Mac desktop, laptop, and now my iPhone. If I’d had these filters 20 years ago, I wouldn’t have the MD disease. Thank you Ocushield! Leon Thurman Burnsville, Minnesota, USA”

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Posted 4 years ago

“Love it, highly recommended.”

Helpful Report

Posted 4 years ago

“although you can’t tell. It isn’t obvious that this screen shield (it’s not really a protector) is filtering part of the spectrum being emitted by your phone. You can see a blue tinge reflected off the edges if you hold your phone just so, but otherwise it’s unobtrusively protecting you from ‘harmful’ blue light. As for screen protection: on my iPhone 8 the Ocushield doesn’t fully extend edge to edge because of the screen curves. So, I needed to buy a more robust case because the edges are where my iPhone cracks when it inevitably drops. All in all, it appears to do its job. As for the benefits … I’m falling asleep pretty quickly at night despite using my phone up to and in bed. I surmise that means it’s working.”

Helpful Report

Posted 4 years ago

Anti blue light screen protector for iPhone - iPhone 7 • 8 Reviews