I only chose 1.74 for my prescription because I have a -5.25 in one eye and a -4.50 in the other as well as a 5 BO prism in both lenses and I can only imagine the thickness/weight of those lenses being horrific. I saw the prism with just a -0.25 in each eye and then I looked at my -3 something in each eye lenses and I just imagined that combination in horror lol.
@ThatGlassesGuy03
4 ай бұрын
Yeesh. That’s definitely a lot of power to manage! Still like to be in the 1.6/1.7 materials even at that power. (Weight with 1.74 isn’t less). But thickness definitely would be in play. Frame choice is hugely key there
@tpellmhall4068
3 жыл бұрын
How do the materials compare for heat resistance? I've been through multiple sets of Costco lenses when I burn handpiles of yard debris in the fall. Not enough heat to give me pause or sunburn, but the lens (or coating) shrivels up and I have ruined another set. Neither my optometrist or Costco can comment on better materials. I'm just glad they used better materials when I was fighting fire, or I would of been blind all summer!
@ThatGlassesGuy03
2 жыл бұрын
So the answer to that comes down to the coatings and material expansion rates. The real answer is GLASS the most thermally stable material available. the Alternative answer is Hivex with a thermal matched AR Coat, which mitigates variance in expansion rates dramatically. Hoya EX3+ is one of the very few more widely available coatings that is matched to the material index reducing this likelihood even further. Our house option is a 1.6 hivex with thermal matched AR and I can count on one hand the number of those I've seen temperature failurs on. If we're comparing to something like costco's AR (a crizal variant) or most optoms (some variant of Crizal Avance or sapphire, or if you're lucky zeiss duravision, if you're REALLY lucky HOYA, You should go buy a lottery ticket they're using something like me, LOL.) When you were fighting fire it was likely with a shield still in front of you drastically reducing the heat and temperature change (I know it's still hot AF in there!), as well as uncoated lenses behind that (pretty standard for fire fighter's inserts :) )
@tpellmhall4068
2 жыл бұрын
@@ThatGlassesGuy03 Thanks for the detailed answer, something to go by with the next Rx if I can find a vendor that carries Hivex. I was a wildland fire guy, so no shield, just a different vendor with different materials I presume. I stuck with glass for a long time, but was partial to aviators for the max eye coverage and had to go to polycarb later due to weight and availability. TPell / MHall
@glen4326
Жыл бұрын
I have a high index (-10.5) but am wanting a lens material gives the best peripheral vision without distortion but not be thick like CR-39. I know to choose a smaller frame but I still have this issue. No optometrist has an answer and it's frustrating.
@ThatGlassesGuy03
Жыл бұрын
Physics have limits. Hivex is the best compromise, but even in perfect centration pushing the limits of center thickness you’re going to be around an 8mm lens thickness at 46MM eye size. (Off the top of my head without my calculator handy). That’s a lot of thickness to manage in a smaller frame as these generally are going to be between 3-5mm thick or less. That still leaves 3mm of visible edge to manage.
@farhanniazi94
3 жыл бұрын
Hi. Recently discovered your channel, great stuff!! Would you recommend 1.60 index for a prescription of - 4.75 and - 5, for someone who cares most about vision quality? I noticed my frame has quite a small "sweet spot" of clarity outside of which there's noticeable blurriness. Hoping to get one with a larger sweet spot, incase it's polycarbonate or higher than 1.60. Thanks
@ThatGlassesGuy03
3 жыл бұрын
Good 1.60 material (mr8+/mr95) definitely helps reduce chromatic abberations off axis, but to improve crispness a good aspheric or atoric lens design is key 😁. .... that's probably too technical... let me try that again 🤣 a premium 1.60 index material with a good freeform/digital lens design and position of wear compensation will provide the best results to "open up the world" so to speak 😁 you'll find a larger sharp zone as well as improved contrast across the lens surface. 🙂
@farhanniazi94
3 жыл бұрын
@@ThatGlassesGuy03 got it. thanks for your response!
@RJ-vb7gh
Жыл бұрын
I'm looking for a good comparison between the different types of glass lenses. I've been doing high index glass and was interested in new light weight glass. My prescription isn't that high, but I'm looking for the lowest weight in glass. Any thoughts?
@ThatGlassesGuy03
Жыл бұрын
Weight and thickness have an inverse correlation in glass. There is no lightweight thin glass. Modern plastics like hivex create a balance i and my customers have been very fond of, as it has a similiar crystalline molecular structure and Abbe value to (or Better than) all but standard 1.5 crown glass at under half the weight. It’s a beautiful thing if weight is a concern. But of course, it still won’t hold up to glass if you’re comparing minute details out beyond 200 meters 😎
@RJ-vb7gh
Жыл бұрын
@@ThatGlassesGuy03 Interesting. I spoke to Corning's materials division and one of their people recommended their new "light weight" glass lenses. Oddly, no local opticians had ever heard of them. But everyone around here is into plastic. I've always worn glass. I only had one pair shatter when dropped, but they were badly tempered as they broke in shards and were replaced free of charge by the lab. Otherwise as my prescription doesn't change much I can wear the same lenses for around a decade on average. Some years ago I switched to smaller frames from my original aviators and went with glass progressives. It worked, but the frames were a little too short for progressives and didn't give me enough lens space for the close up portion. My prescription finally changed and I was doing a bit of sandblasting without goggles so after about only 8 years.... I went with a larger frame and high index glass. I don't notice any issues with the high index glass in terms of clarity etc. But the lens is actually pretty thin and light. It's a decent weight/toughness and clarity trade off imho. Still the prescription has changed in my right eye and I laid down on my glasses and apparently dragged them over the pavement while working on my car... so yes even glass scratches when dragged on pavement. (I still feel the old heat tempered glass lenses were tougher), So as one of the only living opticians left with an appreciation for glass lenses, have you ever heard of Corning's light weight glass and if so, would it have better optical quality than high index glass and perhaps more toughness/scratch resistance? If you haven't heard of lightweight glass, at what point will higher index impact glass clarity? I appreciate your input. 90% of my local opticians won't even talk about glass, much less make it at any price. The best I can usually find locally is someone that will grudgingly send my order out to "the lab" with the disclaimer that they will most likely explode and blind me. Thank you for your kind assistance. Footnote for anyone reading along, If you use glass in an ultra lightweight frame, use ear hooks to keep your glasses in place or the heavier glass will drag down on the ultra light frames and they will drive you nuts.
@LauraAnne95
5 жыл бұрын
👍👍👍 yasss, i totally agree:) I have Zeiss 1.60 or Nikon 1.60 fully-coated lenses in all of my 10 (!) prescription pairs of glasses 🙈 That’s right, I even have YOU beat for glasses selection each day 🙃😂 1.60 works *perfect* with my +3.00 Rx to make them look nice and thin, and keep the magnification of my eyes down 👍👍 also, again, I recommend you TEACH this career :)) really. I just think you explain things very well and passionately 👍
@ThatGlassesGuy03
5 жыл бұрын
I'm a 1.60 nut, obviously 😂. Ten would be fun, I need to step up! 😂 I have a friend that has an entire hanging shoe holder on the closet door full though 😬. Could you imagine? I would never get out the door trying to decide what to wear! 😂 I love making changes to reduce mag for high plus 😁. (It's the caffiene. Caffiene fuelled passion and fire. 😂🤣😂)
@R.C.Bullar
2 жыл бұрын
Best video on KZitem pertaining this subject! Cheers! (1.6 master race)
@ThatGlassesGuy03
2 жыл бұрын
Thanks!!
@paribeshpoudel297
Жыл бұрын
Hello brother I need your suggestion. My lens power is -1.25 in both eyes. I have a polycarbonate lens. When I compared it with another plastic cr39 lens. I feel like my polycarbonate is not that much clear. Does having small power also affects the clarity of polycarbonate lense? Please reply!
@paribeshpoudel297
Жыл бұрын
Also to mention I have a rimless frame. please recommend me some clear lense for this rimless frame.
@ThatGlassesGuy03
Жыл бұрын
Ask your optician about alternative materials in rimless. In general yes cr39 is a much more crisp optical material compared to polycarbonate, particularly the more you get away from the optical center. Of course you can’t (or rather most won’t) put cr39 in a rimless mounting and alternatives will depend on what labs they work with. 🥂
@ThatGlassesGuy03
Жыл бұрын
Also be sure to check out this newer video on the topic - Diving in to Lens Materials! Plastic Vs Glass Vs Polycarbonate and Pros & Cons for all! kzitem.info/news/bejne/umOOuJyngGqdmXo
@ozeltzex1
4 жыл бұрын
Hi, looking for a pair of Smith sunglasses and torn between Trivax & Glass lenses. Not sure by how much glass is heavier and if it matters much since I'm not wearing it all day, but what I do care about is optics. When I tried Maui Jim Glass it was amazing, when tried their Plastic ones (same lens color) it was far worse calirity wise. Are you familiar with Smith Optics and/or can share your opinion on this? Also, given a specific lens color, should lens material affect VLT rating?
@ThatGlassesGuy03
4 жыл бұрын
I haven't had my hands on Smith but I'm familiar with them. For the most part these lenses come from a handful of factories and are finished at different labs. By in large what you see from maui Jim is well representative of others. Trivex is good but prone to certain aberrations and distortions nobody likes to talk about, because they like to compare it to glass. For sunwear I always recommend glass due to the shorter period of wear (usually a few hours at most at one time). Only for really thin nose skin, super oversized, bad fits, etc... is it really worth jumping down to traditional plastics like trivex. Poly is not even in the same league and hivex is the closest plastic to glass in overall clarity and longevity with cr39 being the closest in optical clarity but falling short on longevity :) hope this helps some! Vuarnet is the primary line of sunglasses i sell, and they do make their glass in house (something nobody else does). I also have a new sunglasses line in the works that blows all of this up, but it will be some time before those are ready :) Regardless of what route you go, I'm bappy to help. Quite a sunglasses nut here 😂
@geekgeekrickson260
4 жыл бұрын
Never seen eyeglasses with mirror coating before! Always thought that mirror coating was limited to sunglasses!
@ThatGlassesGuy03
4 жыл бұрын
Oh yes! This is an older optician trick for covering up cosmetic issues, or for some wilder combinations. 😁 i usually use it for the ability to attenuate a specific spectrum of light... but sometimes just to look cool too 🤣
@TheHi-T
10 ай бұрын
Great video! I only heard of Trivex from opticians & optometrists who are on KZitem. My eye doctor did not know about Trivex. 😀 I purchase all my eyewear online with Trivex & 1.60. In the past, all my in person orders, have had poor quality control. Also, I notice when I mention I need sport goggles with impact resistance the sales people need more training. One tried to sell me a frame that looks sport with high-index lenses. 🤦♂ They are also confused why I need to sport goggles for racket sports.
@ThatGlassesGuy03
10 ай бұрын
Good grief!!!! Well. You’ve got a chunk of opticians beat out there it sounds like 😂😂. Today hivex is my go to material, never been a huge Trivex guy, but 1.6 has always been the golden child. 😎🥂
@euphoricrain775
3 жыл бұрын
I’m a -1.25 with a -0.75 astigmatism in both eyes. What’s the best for me? Will 1.60 HD be heavier than polycarb? What about cr-39 plastic? I want good clarity and light weight.
@ThatGlassesGuy03
3 жыл бұрын
Can't go wrong with either one. I wear both 1.6 and CR as well as glass (we have a very similiar rx). In a really good fit there's almost no difference in weight and thickness for cr and 1.6 :) larger lenses or way oversized I would lean towards the 1.6.... that said.. in my shop our default is our hivex 1.54/1.6 so... little different animal. 🤣. You'll do great with cr IMO.
@euphoricrain775
3 жыл бұрын
@@ThatGlassesGuy03 thanks. On a side note I just bought trivex zeiss platinum ar coated lenses and can’t stand them. Too much colored reflections on my lenses. I didn’t have any problems with my old poly carbs with no coatings. If I choose not to go with any AR coatings what’s my best bet: cr 39, poly or 1.60?? Price is not the main factor I just want high quality with no coating. please suggest since I really respect your opinion and knowledge.
@ThatGlassesGuy03
3 жыл бұрын
Without AR easily CR. Trivex is actually very bad about that.. and prone to more purple spectrum reflections. Not a fan at all.
@euphoricrain775
3 жыл бұрын
@@ThatGlassesGuy03 1)what’s best for my prescription in cr39: aspheric or spheric? 2)Also will the cr39’s be noticeably heavier than the poly carb in my prescription noted above? -1.25 SPH and 0.75 CYL.
@ThatGlassesGuy03
3 жыл бұрын
@@euphoricrain775 aspheric cr largely doesn't exist these days. Weight will be lighter in poly but at these powers unless the frame is very large it won't be significantly noticeable.
@dennis60kg
Жыл бұрын
Thanks for your videos! Question, I have 6 BU/6 BD prisms, along with a low strength prescription. Which lens material would give me the best optical clarity and easiest material to adjust to?
@ThatGlassesGuy03
Жыл бұрын
Cr39 or glass. Hivex would be the next step for the best balance of clarity/weight/ thickness. 😎 I’ve done a newer video with more details on this topic here: kzitem.info/news/bejne/umOOuJyngGqdmXo
@dennis60kg
Жыл бұрын
@@ThatGlassesGuy03 thanks for the reply! I watched your new video. I suppose it's not clear to me why I would want to go CR-39 with 6 Diopeters of prism in each lens, wouldn't that be quite thick? My new optometrist uses Essilor lens manufacturer and I think the optometrist only offered me Poly, 1.60, and 1.67 lens material (I plan to get all the coatings and transitions on them because I wear my glasses all day.) Given this information, is polycarbonate still the recommendation? I also will like have a 55mm wide and 38-42 mm height lens for my frame, if this helps. Thanks again!
@ThatGlassesGuy03
Жыл бұрын
@@dennis60kg poly optics will be absolute shit with your rx needs. Yes, it will be thick in CR, you didn’t express thickness concerns, but clarity concerns. Essilor doesn’t do hivex, so yup makes sense. I would go elsewhere ;). And for goodness sakes unless you have a 70 PD get out of that 55 eye frame.
@dennis60kg
Жыл бұрын
@@ThatGlassesGuy03 😭😭😭 I don't have much a choice to go somewhere else. I think my old optometrist uses HOYA. If my only options are poly, 1.6, and 1.67 I should go with 1.6 for the best optics right? & I have a rather large head, so any frames with less than 54-55mm width usually don't fit well. 😭 Unless there are frames with smaller lens width that can still fit my large head. Thanks again. 😢
@ThatGlassesGuy03
Жыл бұрын
Usually there are some made like that, but a lot of places don’t stock them. :/. Yes standard 1.6 will be a good balance, I just far prefer the newer hivex polymer. Some places are already getting hivex 1.6 in place of it and have no idea, so it’s a worthy gamble.
@ffbarnette
3 жыл бұрын
I originally posted a comment about 1.67 and you answered it in your video thanks again
@ThatGlassesGuy03
3 жыл бұрын
Glad to help!! 😁 thanks for watching!!!
@MMID303
Жыл бұрын
My entire life I've always had polycarbonate lenses. Now you're making me feel like I've been missing out on life because I've never seen the world through a glass lens lol.
@ThatGlassesGuy03
Жыл бұрын
Depends on your power, it can be transformational to “no difference” it also depends quite a lot on the person. :) even regular ole cr39 is a pretty solid step up from polycarb and much more readily accessible to get your hands on 😎
@TheHi-T
10 ай бұрын
I switched from polycarbonate to Trivex. Optical clarity & impact resistance is noticeable. My opponent smashed a badminton shuttlecock into my lens. Trivex did not scratch. Last time it happened my polycarbonate scratched so much I had to replace the lenses (sport goggles). FYI: Deliberate smashes to the head/face is considered poor sportsmanship.
@carelessmorning
3 жыл бұрын
How much clearer is glass vs polycarbonate?
@ThatGlassesGuy03
3 жыл бұрын
Very noticeable, especially as you move away from the center of the lens, and as you look further away. Mountains in the distance would be one case where glass blows away all other materials.
@butterflyloveppg772
3 жыл бұрын
At the doctors, they sold my poly for $90 extra instead of regular plastic. It seems poly was the best they had so I'm confused since you are saying they don't like it lol.
@ThatGlassesGuy03
3 жыл бұрын
It is almost always sold as an upcharge to get poly. That doesn't make it good. Poly is not the best anyone has for anything really. It's great if you need a material you can flex easily to get into a frame... thats about all I've got in the pros box for it 😅
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