9 ms·
The record-breaking -108.00 diopter myopia lenses (2016)
- dj_mc_merlin 4y agoI wonder how expensive it is?
- almostnormal 4y agoHow did they come up with that prescription?
- treeman79 4y agoLast time I looked into it. Glue. Gluing several lenses together. That was for around 70 diopter.
- sublinear 4y agoThe web dev needs their eyes checked. The paragraphs of this article don't have word breaks for the mobile CSS.
- 542458 4y agoVideo showing the lenses in question: https://youtu.be/Bd6V61EAIbk https://youtu.be/Bd6V61EAIbk (Sorry if these were in the OP link and I didn’t see them - the site is unusable on mobile) I have no idea how this would work in a practical sense - the image minification would be massive. It would be like looking through backwards binoculars at all time.
- schiffern 4y ago>the site is unusable on mobile https://archive.vn/azRuX https://archive.vn/azRuX >It would be like looking through backwards binoculars The patient is a professional photographer, so he's probably used to that!
- Jenk 4y ago> the image minification would be massive. The mind boggles : - )
- andy_ppp 4y agoDoes anyone have a picture, it’s hard to tell on mobile if there should be one as the site is just broken…
- merolish 4y agoIt looks better in desktop mode. There's a slideshow showing the lenses and the patient wearing them.
- jeroenhd 4y agoThe images from the bottom of this article: https://www.pointsdevue.com/sites/default/files/styles/diaporama-full/public/content-images/article/201606/fig1-lens-108.00-6.00-25-produced-in-essilor-sl-lab-special-lens-laboratory-france-copie.jpg https://www.pointsdevue.com/sites/default/files/styles/diapo... https://www.pointsdevue.com/sites/default/files/styles/diaporama-full/public/content-images/article/201606/fig2-lens-ready-for-optical-quality-control-with-a-radiuscope-in-essilor-sl-lab-special-lens-laboratory-france-copie.jpg https://www.pointsdevue.com/sites/default/files/styles/diapo... https://www.pointsdevue.com/sites/default/files/styles/diaporama-full/public/content-images/article/201606/fig3-lens-reception-in-slovakia-copie.jpg https://www.pointsdevue.com/sites/default/files/styles/diapo... https://www.pointsdevue.com/sites/default/files/styles/diaporama-full/public/content-images/article/201606/fig4-lens-marking-before-edging-copie.jpg https://www.pointsdevue.com/sites/default/files/styles/diapo... https://www.pointsdevue.com/sites/default/files/styles/diaporama-full/public/content-images/article/201606/fig5-frame-scanning-with-essilor-mr-blue-copie.jpg https://www.pointsdevue.com/sites/default/files/styles/diapo... https://www.pointsdevue.com/sites/default/files/styles/diaporama-full/public/content-images/article/201606/fig6-lens-edging-copie.jpg https://www.pointsdevue.com/sites/default/files/styles/diapo... https://www.pointsdevue.com/sites/default/files/styles/diaporama-full/public/content-images/article/201606/fig7-lens-mounting-copie.jpg https://www.pointsdevue.com/sites/default/files/styles/diapo... https://www.pointsdevue.com/sites/default/files/styles/diaporama-full/public/content-images/article/201606/fig8-eyeglasses-after-mounting-copie.jpg https://www.pointsdevue.com/sites/default/files/styles/diapo... https://www.pointsdevue.com/sites/default/files/styles/diaporama-full/public/content-images/article/201606/fig9-jan-miscovic-and-optometrist-sebastian-chrien-copie.jpg https://www.pointsdevue.com/sites/default/files/styles/diapo... https://www.pointsdevue.com/sites/default/files/styles/diaporama-full/public/content-images/article/201606/fig10-jan-miscovic-delighted-with-his-new-eyeglasses.jpg https://www.pointsdevue.com/sites/default/files/styles/diapo... The last two show the wearer actually wearing the glasses.
- mutagen 4y agoPhotos and a video of the lenses in glasses at the bottom of the article. They're as strange as the extreme diopter would suggest but it's great to give vision back to Jan and allow him to continue his photography.
- superkuh 4y agoI'm shocked at how thin those lenses are. I'm at -11.5 diopter and my edges are already >1cm thick. It sounds like it's one lens set entirely inside another one? Even using 1.8 index material the thinness is really impressive. I bet the chromatic abberation isn't, though. It's not 1-to-1 but generally the higher the refractive index the lower the Abbe number, the more colors get split apart.
- lucb1e 4y agoThe concentric rings of increasing blurriness remind me of a Fresnel lens. I'm no optician and always found the physics of light rays confusing as heck so the only words I understand from the wikipedia aricle are "A Fresnel lens can be made much thinner than a comparable conventional lens, in some cases taking the form of a flat sheet." Maybe someone else can tell whether that's what's being used here? https://en.wikipedia.org/wiki/Fresnel_lens https://en.wikipedia.org/wiki/Fresnel_lens
- porphyra 4y agoI don't think it's a Fresnel lens. Fresnel lenses have rather obvious rings and have poor optical qualities for most applications besides light sources, cheap slide projectors, and magnifying glasses. Here, the "lens-within-a-lens" effect that you see is because, generally speaking, myopia lenses shrink the image. But this lens is so extreme that the image is shrunk into a small bubble in the middle. The ring-like structures around this bubble are due to internal reflections within the lens.
- Lanrei 4y agoThe article says that they're biconcave, which means that the thinnest part of the lens is in the centre (similar to a red blood cell). For high-myopia lenses, they often remove the lens material away from the centre to limit the maximum thickness at the expense of reducing the field of view. The resulting surface is usually left unpolished, but the lens underneath will still bend light, resulting in the circular patterns you mentioned. In this case a very large amount of material is removed as they would be impossible to use with a conventional frame otherwise. The alternative would be to use glasses with very small lenses.
- Bud 4y agoJeez, and I thought my -12.5 prescription was bad!
- t-writescode 4y agoI had relatively mild nearsightedness in the past. I look at those lenses and I'm having trouble even comprehending what the world would look like if you need a prescription like that. Is everything so out of focus it's all basically a singular colored blur? Or..?
- throwawaygo 4y agoI assume this is here to discuss the mobile experience.
- userbinator 4y agoAccording to https://en.wikipedia.org/wiki/Myopia#Degree https://en.wikipedia.org/wiki/Myopia#Degree more than -6 is already considered high, and this is more than 16x that. I wonder what the shape of his eyes is like for such an extreme case.
- delecti 4y agoYeah, I'm shocked at this. Before seeing this, my naïve guess for "how strong do you think glasses get" would have been in the range of -15 to -20. I've got a friend in the -8 ballpark and already thought that was surprising.
- Aulig 4y agoYes, above 5-6 diopters is considered high myopia, since that's where the risks for retinal detachment, glaucoma, etc. already increase significantly due to the elongated eyeball. With high myopia, the vertex distance [0] starts to play a big role. Basically, as an example, if someone needs -10D glasses, the eye just has around -8.75D of myopia [1] (when wearing contact lenses). This gap becomes larger the higher the diopters are. Using the formula on [0], I think this person has around -46.5D of myopia, but needs -106D glasses due to the vertex distance. [0] https://en.wikipedia.org/wiki/Vertex_distance https://en.wikipedia.org/wiki/Vertex_distance [1] https://en.wikipedia.org/wiki/Vertex_distance#/media/File:VertexDistanceDiff.svg https://en.wikipedia.org/wiki/Vertex_distance#/media/File:Ve...
- tim333 4y ago
- armatav 4y agoThis guy can practically see into the future with that
- m463 4y agoProbably still a little shortsighted. Should be ok for any publicly traded company.
- paulpauper 4y agoPeople who are very nearsighted have those weird sort of lens when viewed from the front it looks like they have a lens within a lens. The edges are very thick and it tapers down at the center. here is what it looks like https://pbs.twimg.com/media/CLloldZWgAAzrWz?format=jpg&name=4096x4096 https://pbs.twimg.com/media/CLloldZWgAAzrWz?format=jpg&name=...
- melony 4y agoI think those are high index lenses, not normal lenses. I might be wrong though.
- lostlogin 4y agoI don’t think that changes how the effect works though, just reduces the thickness of the glasses. I’m very much not expert at this, I just help a child with poor eyesight, and every upgrade that reduces weight and thickness is much appreciated.
- Someone 4y agoFrom the slide show on this side, this is such a lens. Because of the high diopter, the center part is even smaller. It seems they correct a bit for that by moving the glasses closer to the eye. That increases the angular extent of the lens a bit for the wearer.
- timonoko 4y agoNormal human lens is already +50. How is it possible to have +150 eye? Even if the lens is perfect sphere it cannot be +150. The focal length would be 7 millimeters. Correction: The focal length of sphere = 3R/2. Assuming 2 mm lens radius, most extreme case would be 3 mm which means. +333 diopters. Now correct that.
- tim333 4y agoI had a funny thing producing a focal length of about 7mm the other day. I had a vitrectomy where they take out the middle bit of your eye and put in a gas bubble instead which gradually dissolves and is replaced by liquid. At one point when lying on my back so with the bubble against the lens it did that. You get some odd effects!
- otagekki 4y agoAt that point, replacing the lens with a one having a better focal length might be a good idea...