However, if your eyes are exposed to long-term UV radiation without proper protection, you may be at a greater risk of developing cataracts and/or macular degeneration later in life.

Blue-violet light is between 400 nm and 455 nm as stated by ISO TR20772-2018. (ISO: International Standards Organization – “Ophthalmic optics – Spectacles lenses – Short Wavelength visible solar radiation and the eye, FD ISO/TR 20772”)

When/where did they say that? I never saw that and I feel like I’ve checked out everything released so far pretty extensively. I haven’t seen diopter adjustment in anything except pancake lenses, I don’t really understand how you even could with fresnel or aspheric lenses.

No amount of lens cleaning or exposure to heat will affect the protective qualities of sunglasses with UV protection embedded. Choose a brand known for the quality of its lenses—like Wiley X, Maui Jim, or Ray-Ban—to get sunglasses that come standard with UV protection.

So I sincerely hope the upcoming Crystal or 12k allows me to keep seeing things this way. I also wish there is some way that they can adjust lens focus for people not having 20/20 vision. For me, a thinner face pad already did the trick.

The sun poses the biggest daily threat when it comes to ultraviolet radiation. However, welding equipment, tanning beds, and lasers can also produce UV rays. They may require special eye protection beyond regular sunglasses, so make sure you have the right gear.

Polarization refers to a lens’s ability to reduce glare and haze in bright sun. While the sun’s rays often hit you directly, they can also reflect off of water, sand, snow, and buildings. Polarized lenses tend to be most helpful for reducing glare around these reflective surfaces.

But, until we can reach a good point like that, I don’t have any interest in pancake lenses. I’ll happily take bulky HMDs, such as the current Pimax designs, if it means being able to have very wide FoV and a packed feature set. It’s sort of like laptops in a way, where sure very small form factors that’re easier to transport exist, but by the sheer nature of having more space a 17-inch laptop can usually fit far more into it, be it things like ports, unsoldered ram, higher power components due to better cooling, vs a 15.6 and especially 14-inch laptop.

Fresnel lens vs pancake lenscost

It’s possible for UV protection to decrease after years of wear, so it’s a good practice to replace your eyewear every few years. When shopping for the right style, make sure to consider the fit and temple coverage as well. These elements can provide additional protection for people regularly exposed to heavy, direct sunlight.

Yes! In fact, if you opt for glasses without 100% UV protection, you may as well not wear sunglasses at all. Adding a UV coating to your Rx lenses is easy, and often comes free with the lenses you order from FramesDirect.com.

Pancakelensesvs fresnelreddit

However, I am not personally in love with the current state for gaming given how it feels like FoV is even more limited with pancake lenses than with current HMDs. The industry is regressing on FoV and that frustrates me. Would I give up some FoV to have pancake optics and the extra comfort? Perhaps. I might even be able to live with something like 130 horizontal in a form factor like the Arpara or the MeganeX if the rest of the features were compelling and good.

Fresnellenses

Even if sunglasses are dark enough to block visible light, that does not automatically mean they provide protection from UV radiation. It can actually be more harmful to wear dark shades without UV protection than to not wear any sunglasses at all. This is because the dark tint may allow your pupils to remain larger in the sun, which can expose your eyes to more damage from UV radiation.

Sorry to put in a point that’s not really related to Pancake Lens, but just the lens. Most headsets today are designed for the 20/20 vision people, which I found really strange. How many people here actually have 20/20 vision? Why headsets are not more accommodating for near or far-sighted people? You know, there will be way way more distortion and ghosting if I have to put my glasses on top of the lens, and the glasses will make the VR experience much worse. In the early days of VR, some headset’s lens actually can be adjusted forward and backward, which helps my near-sighted problem, but today after trying Pimax, HP G2, and Meta Quest 2, I’d say the most concerning issue for me is “can I see clearly without eyeglasses in my headset”? Pancake, aspheric or Fresnel makes no difference when I have to wear the glasses within the headset. It will be bad anyway. For some reason, when wearing my Pimax 5K Super, I can see things comparably clearly without my glasses, and that’s a huge plus for me. And this is why Pimax headset is my favorite: I can see super-wide pictures with my bare eyes ! The screen-door effect is just a tiny problem. So I sincerely hope the upcoming Crystal or 12k allows me to keep seeing things this way. I also wish there is some way that they can adjust lens focus for people not having 20/20 vision. For me, a thinner face pad already did the trick.

The Fresnel optics features a wide field of view compared to Pancake but is prone to chromatic aberrations (ghosting/overlapping colours). Furthermore, software calibration taking up processing power must account for Fresnel lens known as “distortion’.

Wraparound, or sunglasses with a wrapped profile are the best sunglasses for UV protection because they offer the most coverage. This style of frame curves around your features to provide ample protection from straight-on and peripheral sunlight.

FramesDirect offers thousands of sunglasses and eyeglasses from top designers and brands. Contact us with any questions about specific frames or how to add UV coating to your glasses.

There are three types of ultraviolet radiation: UVA, UVB, and UVC. Both UVA and UVB rays (or simply, UV radiation) can cause short- and long-term damage to your eyes and your vision. This makes UVA and UVB rays the target for UV protection in glasses and sunglasses. UVC radiation is considered a minimal threat because it’s absorbed by the earth’s ozone layer.

I have kind of been waiting for reports of some home tinkerer having motorized that dial in one of those HMDs, to produce a sort of makeshift varifocal functionality. :9 (No idea how much the zoom level changes with this change in a pancake setup, either…)

The biggest benefit of pancake lenses is comfort. To be totally honest, the 12K looks perfect in everyway except this one point. The current fresnel form factor is going to look like like those giant cellphones from the early 90s.

Crystal specs do claim a 7 diopter adjustment range; I don’t recall anything about whether this range starts in the negatives, or if that is only plus 0-7… I wondered a bit whether the diagonal flange on the eyetubes, in the parts pictures that were posted the other day, were part of the adjustment mechanism in any way, but who knows – the tubes themselves look to be completely rigid…

Sunglasses can reduce some of your exposure to blue light, but they may not block the entire spectrum of blue light. Certain sunglasses tints, such as dark amber, are most effective at reducing the amount of blue light exposure from a digital screen.

Asphericvs pancakelenses

Is the pancake lens approach inherently incapable of or disadvantaged for wide FOV? Or is it merely that early incarnations of them have relatively narrow FOV?

As of right now, I think Pancake lenses will be great and what is truly needed for something like working in VR to become viable. It makes headsets thin and light enough to be both extremely comfortable to slip on and wear for hours without the slightest strain. I’ve seen some express wanting to have a ‘monitor replacement’ VR headset, and I’ve never felt like it’s viable long term even with the super high clarity HMDs. The comfort just isn’t there yet.

Pancake lensVR

This is called photokeratitis, and it can make your eyes become red and puffy. It can also make your eyes feel gritty, like you might have sand in them. If you’re very sensitive to light, you may suffer from excessive tearing. Fortunately, these symptoms are usually temporary.

Your lens material can provide some protection too. Polycarbonate lenses and other high-index plastics like Trivex inherently provide 100% UV protection. However, regular plastic lenses must have a UV coating added to make them UV-protective.

Another thing I wonder about pancake lenses. If they have poor light transmittance, does that mean they heat up? The energy from the lost light has to be going somewhere. But maybe it’s not enough energy in total to matter.

If they are made with polycarbonate or a similar material, safety glasses may naturally block UV radiation. If not, a UV-protective coating can likely be added during production when you order a new pair.

Yes. A UV coating on eyeglasses and sunglasses protects your eyes from harmful ultraviolet radiation. Even short-term exposure to ultraviolet radiation without wearing UV-protective sunglasses or eyeglasses can cause damage in your eyes that is similar to a sunburn.

Photochromic lenses — the ones that darken automatically when exposed to direct sunlight — already have UV protection embedded in them.

Ideally, your sunglasses should be labeled as UV400 or providing 100% UVA-UVB protection against the sun’s UV rays. You should be able to verify from the sticker or product information included with a pair of sunglasses how much UV protection they provide.

Valve Indexpancakelenses

12k will have “Bionic” lenses, so aspheric directly forward, then fresnel towards the edges. The processor on the HMD works with the Tobii eye tracking to correct distortion. It won’t be using Pancake lenses, this is just a discussion about tech that’s out in the world.

I don’t believe Pimax is shipping any pancake lens headsets. I’m actually not sure what they are using for lenses on the Crystal, but I’m quite sure its not a pancake lens design.

Fresnel lens vs pancake lensvr headset

UV protection is accomplished by adding a coating to sunglasses and eyeglasses lenses during the manufacturing process. This UV coating blocks the sun’s harmful ultraviolet radiation, keeping it from your eyes and the delicate skin around them. UV protection on your glasses and sunglasses lenses helps protect your eyes from the damage UV radiation can cause.

I guess one thing that might slightly reduce the comfort gain, is that the screens need to be brighter, in order to compensate for the loss in the lens train, which strikes me as likely to mean more heat, closer to the face… :7

Wearing blue light filtering glasses during prolonged computer or tablet use can filter some blue-violet light and may enhance your sense of visual comfort.

Blue light filtering lens treatment is among the available eye protection technologies we offer. Many digital LED screens emit blue light, which may contribute to glare and discomfort after extended use.

UV-protective sunglasses and glasses feature a thin coating of UVA- and UVB-blocking material to protect your eyes outdoors. This UV coating can be applied to any plastic or glass lens for maximum protection. UV protection is so important that FramesDirect provides this UV-protective coating on all of our lenses at no additional cost.

Stems from Pancake’s boucing of light within lens itself, resulting in low light efficiency. Problem of ghosting and is also a scourage for this lens. Also，the cost of Pancake is nearly 10 times higher than that of Fresnel lens

Kopin announced an all plastic Pancake lens design called P95, which specially optimized for use with 2.6K x 2.6K OLED high-brightness microdisplays.

So I sincerely hope the upcoming Crystal or 12k allows me to keep seeing things this way. I also wish there is some way that they can adjust lens focus for people not having 20/20 vision. For me, a thinner face pad already did the trick.

Well, maybe not quite entirely specifically unrelated, given one of the noteable features of recent headsets with pancake optics, such as the Arpara, has indeed been diopter adjustability. Don’t know whether you had noticed this, and this is what prompted your post, or not… :7

If that´s really true, I will for sure buy the 12K. I found little amount of other headset with such diopter adjustment. to mention VIVE Flow (forget about FoV). I just quote from a reddit post and adapt a little bit " 75% of adults use vision correction. Even the CHEAPEST binoculars have diopter adjustments…" Which means, those who can afford (Hear me, PIMAX, Your dear customer is speaking!), often require diopter adjustment + IPD adjustment or at least fitting for wearing Glasses or diopter adapters.

Hum, let’s dream, what about a mix of both : a lens composed by a pancake for the center, mounted on a fresnel lens to cover the peripherical area of a wide fov ?

Quest 3pancakelenses

Gamers and computer users who spend long hours on a screen may even want to opt for lenses in a bronze, copper, or reddish-brown tint to filter out a larger spectrum of blue light and enhance their eye comfort.

Pancake, on the other hand, works by folding a series of lenses into a curved shape and bouncing light within the glass or plastic. This allows VR HMDs to be thinner and lighter, while also freeing up processing power due to the lack of distortion.

Choose sunglasses that offer 100% UV protection and they will likely also filter out some blue-violet light, also known as high-energy visible (HEV) light rays.

No. Polarization and UV protection are different, so it’s important to make sure that UV protection is included when shopping for polarized sunglasses. It’s common for companies to advertise them together because polarization is typically only offered with sunglasses. But remember: Polarization alone does not protect your eyes from UV radiation.

Adding a UV coating and blue light filtering coating to your eyeglasses will filter out much of the blue-violet light emitted from LED screens as well. Since blue-violet light is emitted from LED screens, and UV rays and blue-violet light are emitted from the sun, it may be worthwhile to opt for both coatings to ensure extra protection.

If you plan to step outside in your glasses without switching to shades, a UV coating is an important option to consider. Fortunately, lenses don’t need a dark tint to provide 100% UV protection. The UV coating is effective at blocking UV radiation whether you have clear lenses or tinted sunglasses.

While most commonly seen as rectangular frames, you can find sleek wraparound styles with oval and rounded lenses. Some of our top performance brands, including Smith, Oakley, and Maui Jim, make wraparound frames with 3-, 5-, and 8-base wraps. These ensure your frames stay balanced and comfortable through high-octane activities while providing the most protection possible.

Be sure to double-check product details to ensure you’re getting full coverage. FramesDirect offers a UV coating that can be added at checkout, so no matter what frames you choose, you can be certain your eyes are shielded from 100% of the sun’s harmful rays.

Our clear, UV-protective lens coating blocks 100% of harmful UVA and UVB rays and comes standard on all polycarbonate and high-index lenses. Without changing the color of the lens, the coating will help defend your eyes against UVA and UVB rays.