On Tuesday, 14 June 2022 at 23:25:16 UTC+2, Tabby wrote:> On Tuesday, 14 June 2022 at 20:23:23 UTC+1, Martin Brown wrote: > > On 14/06/2022 18:29, John Larkin wrote: > > > Eyesight is important in this biz. > > > > > > Make sure you get lots of vitamin A, but not too much. It's good for > > > your retinas and can help prevent macular degeneration. > > Vitamin A is one of the more poisonous vitamins. It is quite hard to be > > deficient in it with a normal diet. Eating polar bear liver can be fatal > > because of the high concentration of vitamin A in it. Second one down: > > > > https://blogs.unimelb.edu.au/sciencecommunication/2016/10/04/eating-these-animals-just-might-kill-you/# > > > > Or the infamous case of the UK guy with a carrot juice addiction. > > > > https://www.nytimes.com/1974/02/17/archives/carrotjuice-addiction-cited-in-britons-death.html > > > > Golden rice has been made by GM to avoid problems in the third world. > > > > https://en.wikipedia.org/wiki/Golden_rice > Carrots don't contain vitamin A, they have carotenes. The rate of conversion to vitamin A in humans is close to zero.fake Actually, carrots are pretty rich in carotenoids. 100g contain 8,280 mcg of beta-carotene and 3,480 of alpha-carotene. Practically, a medium carrot has about 500 mcg RAE of vitamin A, or 56% of the recommended daily intake! Furthermore, you could drink carrot juice to really boost your vitamin A intake. How much vitamin A in carrots? - LazyPlant lazyplant.com/vegan-diet/vitamin-a-in-carrots/ lazyplant.com/vegan-diet/vitamin-a-in-carrots/ Is Vitamin A In Carrots - TheSuperHealthyFood https://thesuperhealthyfood.com/is-vitamin-a-in-carrots 12.06.2022 · Carrots are an excellent source of vitamin A in the form of beta carotene. They are also a good source of several B vitamins, as well as vitamin K and potassium. Other plant What are the benefits of vitamin A in carrots? Vitamin A is a fat-soluble vitamin that increases body immunity, organ function, and eye health. Vitamin A also increases visual acuity to adjust your eyes in dimming light. One cup of raw carrots gives 50 calories and 430% of the daily value for vitamin A and cooked carrots provide 530% of the recommended daily value per cup. 10 Vitamin in Carrots: Nutrition Facts and Health Benefits www.thewownutrition.com/vitamin-in-carrots/
vitamin A
Started by ●June 14, 2022
Reply by ●June 14, 20222022-06-14
Reply by ●June 14, 20222022-06-14
On Tue, 14 Jun 2022 18:56:50 -0400 (EDT), Martin Rid <martin_riddle@verison.net> wrote:>John Larkin <jlarkin@highland_atwork_technology.com> Wrote in message:r >> On Tue, 14 Jun 2022 13:28:39 -0500, John S <Sophi.2@invalid.org>wrote:>On 6/14/2022 12:29 PM, John Larkin wrote:>> Eyesight is important in this biz.>> >> Make sure you get lots of vitamin A, but not too much. It's good for>> your retinas and can help prevent macular degeneration.>> >>Bausch and Lomb make PreserVision AREDS pills for that purpose. I take >them because I have the early stage of macular degeneration.>>tinyurl.com/rchzazrcThat stuff looks good.I was disgnosed with major MD and got a pretty gloomy lecture about myfuture. Then they did a retinal tomograph just for fun and found amacular hole, not MD. That can probably be repaired, but the scaremade me amp up on Vitamin A.My eyesight is horrible anyhow. My Mantis is indispensable whenprobing or soldering or hacking small stuff.-- If a man will begin with certainties, he shall end with doubts, but if he will be content to begin with doubts he shall end in certainties.Francis Bacon > >Make sure you use a fume extractor when soldering. That flux > isn't good for your corneas either. > >CheersMy eyes are tucked into the Mantis visor, about 12" above the bench. Another great thing about the Mantis is the huge working distance. -- If a man will begin with certainties, he shall end with doubts, but if he will be content to begin with doubts he shall end in certainties. Francis Bacon
Reply by ●June 14, 20222022-06-14
On 15/06/2022 3:29 am, John Larkin wrote:> Eyesight is important in this biz. > > Make sure you get lots of vitamin A, but not too much. It's good for > your retinas and can help prevent macular degeneration. >You might also like to try Taurine which has heaps of research showing a positive (albeit sometimes small) benefit. And Lutein which has a long history of use to prevent and treat MD. I might be on JL's shit list so can someone who isn't respond so he see's this - nothing worse than sitting in the dark if you don't have to.
Reply by ●June 14, 20222022-06-14
On 06/14/2022 01:16 PM, John Larkin wrote:> I was disgnosed with major MD and got a pretty gloomy lecture about my > future. Then they did a retinal tomograph just for fun and found a > macular hole, not MD. That can probably be repaired, but the scare > made me amp up on Vitamin A.I had a macular hole repair about 4 years ago. The operation itself isn't a big deal. The vitreous fluid is removed and the eye inflated with a gas. Sulfur hexafluoride is the more modern one and absorbs faster. That's where the fun begins. To ensure the gas supports the retina you are required to be face down for about three days depending on the surgeon. As a bonus the SF6 hastens cataract formation. There's an interesting effect as the eyeball refills with vitreous fluid. It brings home the fact that the image on the retina is upside down and your brain does some post-processing. I haven't done the cataract operation yet although I should. It takes a long time for the hole to refill with sensors and between that and the cataract I still see a little distortion in printed material etc.
Reply by ●June 15, 20222022-06-15
On Tue, 14 Jun 2022 20:24:01 -0600, rbowman <bowman@montana.com> wrote:>On 06/14/2022 01:16 PM, John Larkin wrote: >> I was disgnosed with major MD and got a pretty gloomy lecture about my >> future. Then they did a retinal tomograph just for fun and found a >> macular hole, not MD. That can probably be repaired, but the scare >> made me amp up on Vitamin A. > >I had a macular hole repair about 4 years ago. The operation itself >isn't a big deal. The vitreous fluid is removed and the eye inflated >with a gas. Sulfur hexafluoride is the more modern one and absorbs >faster. That's where the fun begins. To ensure the gas supports the >retina you are required to be face down for about three days depending >on the surgeon. As a bonus the SF6 hastens cataract formation. > >There's an interesting effect as the eyeball refills with vitreous >fluid. It brings home the fact that the image on the retina is upside >down and your brain does some post-processing. > >I haven't done the cataract operation yet although I should. It takes a >long time for the hole to refill with sensors and between that and the >cataract I still see a little distortion in printed material etc. >I had cataract surgery on my right eye. Followed by a tear, a massive retinal detach, vitrectomy, retina repair, laser spot welding, secondary cataract, two laser fixes for that. Everything went wrong but it's fine now. It's stunning how good opthomologists are these days. Some people say that the inverted human retina is a mistake of evolution. I disagree: virtuous humor is the mistake. Eyes are much better off with liquid inside than with gummy gel. Time to do the left one now: first cataract surgery, then the macular hole repair. These things take 20 minutes and don't hurt at all. I'm going for nearsighted in both eyes, for reading and computing and close work. -- Anybody can count to one. - Robert Widlar
Reply by ●June 15, 20222022-06-15
On 06/14/2022 10:10 PM, jlarkin@highlandsniptechnology.com wrote:> I had cataract surgery on my right eye. Followed by a tear, a massive > retinal detach, vitrectomy, retina repair, laser spot welding, > secondary cataract, two laser fixes for that. Everything went wrong > but it's fine now. It's stunning how good opthomologists are these > days.I had a little welding done prior to the hole repair. The shrinking vitreous resulted in a little bleeder and I suddenly had floaters from hell.> Some people say that the inverted human retina is a mistake of > evolution. I disagree: virtuous humor is the mistake. Eyes are much > better off with liquid inside than with gummy gel.It's not a mistake, just optics. I recall an experiment where the subject wore prismatic glasses that would invert the image. In a few days the brain adapted. The optic chiasm is another design feature, sort of a signal splitter followed by a mixer.> I'm going for nearsighted in both eyes, for reading and computing and > close work.I'll probably go nearsighted for my right eye since it naturally is more nearsighted than my left.
Reply by ●June 15, 20222022-06-15
On Wed, 15 Jun 2022 08:15:42 -0600, rbowman <bowman@montana.com> wrote:>On 06/14/2022 10:10 PM, jlarkin@highlandsniptechnology.com wrote: >> I had cataract surgery on my right eye. Followed by a tear, a massive >> retinal detach, vitrectomy, retina repair, laser spot welding, >> secondary cataract, two laser fixes for that. Everything went wrong >> but it's fine now. It's stunning how good opthomologists are these >> days. > >I had a little welding done prior to the hole repair. The shrinking >vitreous resulted in a little bleeder and I suddenly had floaters from >hell. > >> Some people say that the inverted human retina is a mistake of >> evolution. I disagree: virtuous humor is the mistake. Eyes are much >> better off with liquid inside than with gummy gel. > >It's not a mistake, just optics. I recall an experiment where the >subject wore prismatic glasses that would invert the image. In a few >days the brain adapted. The optic chiasm is another design feature, >sort of a signal splitter followed by a mixer. > > >> I'm going for nearsighted in both eyes, for reading and computing and >> close work. > >I'll probably go nearsighted for my right eye since it naturally is more >nearsighted than my left. >If you skew the focal lengths, your brain will merge the images and you can get sharp vision over a pretty wide distance range. My fake lens focusses at about 17", so the new one might be 10 or 12. I'm going to talk to the cataract surgeon about how far that concept can be pushed. 17 works for computing and most reading but is marginal for fine print. -- If a man will begin with certainties, he shall end with doubts, but if he will be content to begin with doubts he shall end in certainties. Francis Bacon
Reply by ●June 15, 20222022-06-15
On Wed, 15 Jun 2022 10:34:22 +1000, David Eather <eatREMOVEher@tpg.com.au> wrote:>On 15/06/2022 3:29 am, John Larkin wrote: >> Eyesight is important in this biz. >> >> Make sure you get lots of vitamin A, but not too much. It's good for >> your retinas and can help prevent macular degeneration. >> > >You might also like to try Taurine which has heaps of research showing a >positive (albeit sometimes small) benefit. And Lutein which has a long >history of use to prevent and treat MD. > >I might be on JL's shit list so can someone who isn't respond so he >see's this - nothing worse than sitting in the dark if you don't have to.There are a few people here who are not worth reading, much less responding to, but you're not one of them. Eyesight is not a very far off-topic issue for electronic designers. Our biz is very visual and often the parts are hard to see. -- If a man will begin with certainties, he shall end with doubts, but if he will be content to begin with doubts he shall end in certainties. Francis Bacon
Reply by ●June 15, 20222022-06-15
On Tuesday, 14 June 2022 at 22:38:27 UTC+1, lang...@fonz.dk wrote:> tirsdag den 14. juni 2022 kl. 23.25.16 UTC+2 skrev Tabby: > > On Tuesday, 14 June 2022 at 20:23:23 UTC+1, Martin Brown wrote: > > > On 14/06/2022 18:29, John Larkin wrote: > > > > Eyesight is important in this biz. > > > > > > > > Make sure you get lots of vitamin A, but not too much. It's good for > > > > your retinas and can help prevent macular degeneration. > > > Vitamin A is one of the more poisonous vitamins. It is quite hard to be > > > deficient in it with a normal diet. Eating polar bear liver can be fatal > > > because of the high concentration of vitamin A in it. Second one down: > > > > > > https://blogs.unimelb.edu.au/sciencecommunication/2016/10/04/eating-these-animals-just-might-kill-you/# > > > > > > Or the infamous case of the UK guy with a carrot juice addiction. > > > > > > https://www.nytimes.com/1974/02/17/archives/carrotjuice-addiction-cited-in-britons-death.html > > > > > > Golden rice has been made by GM to avoid problems in the third world. > > > > > > https://en.wikipedia.org/wiki/Golden_rice > > Carrots don't contain vitamin A, they have carotenes. The rate of conversion to vitamin A in humans is close to zero. > hmm https://academic.oup.com/ajcn/article/91/5/1468S/4597430says " There is a wide variation in conversion factors reported not only between different studies but also between individuals in a particular study." so one can not rely on carotenes ro provide vit A.
Reply by ●June 15, 20222022-06-15
On Wednesday, 15 June 2022 at 01:09:08 UTC+1, a a wrote:> On Tuesday, 14 June 2022 at 23:25:16 UTC+2, Tabby wrote: > > On Tuesday, 14 June 2022 at 20:23:23 UTC+1, Martin Brown wrote: > > > On 14/06/2022 18:29, John Larkin wrote: > > > > Eyesight is important in this biz. > > > > > > > > Make sure you get lots of vitamin A, but not too much. It's good for > > > > your retinas and can help prevent macular degeneration. > > > Vitamin A is one of the more poisonous vitamins. It is quite hard to be > > > deficient in it with a normal diet. Eating polar bear liver can be fatal > > > because of the high concentration of vitamin A in it. Second one down: > > > > > > https://blogs.unimelb.edu.au/sciencecommunication/2016/10/04/eating-these-animals-just-might-kill-you/# > > > > > > Or the infamous case of the UK guy with a carrot juice addiction. > > > > > > https://www.nytimes.com/1974/02/17/archives/carrotjuice-addiction-cited-in-britons-death.html > > > > > > Golden rice has been made by GM to avoid problems in the third world. > > > > > > https://en.wikipedia.org/wiki/Golden_rice > > Carrots don't contain vitamin A, they have carotenes. The rate of conversion to vitamin A in humans is close to zero. > fake > > Actually, carrots are pretty rich in carotenoids. 100g contain 8,280 mcg of beta-carotene and 3,480 of alpha-carotene. Practically, a medium carrot has about 500 mcg RAE of vitamin A, or 56% of the recommended daily intake! Furthermore, you could drink carrot juice to really boost your vitamin A intake. > How much vitamin A in carrots? - LazyPlant > lazyplant.com/vegan-diet/vitamin-a-in-carrots/ > lazyplant.com/vegan-diet/vitamin-a-in-carrots/ > > > Is Vitamin A In Carrots - TheSuperHealthyFood > https://thesuperhealthyfood.com/is-vitamin-a-in-carrots > > 12.06.2022 · Carrots are an excellent source of vitamin A in the form of beta carotene. They are also a good source of several B vitamins, as well as vitamin K and potassium. Other plant > > > What are the benefits of vitamin A in carrots? > Vitamin A is a fat-soluble vitamin that increases body immunity, organ function, and eye health. Vitamin A also increases visual acuity to adjust your eyes in dimming light. One cup of raw carrots gives 50 calories and 430% of the daily value for vitamin A and cooked carrots provide 530% of the recommended daily value per cup. > > 10 Vitamin in Carrots: Nutrition Facts and Health Benefits > https://thesuperhealthyfood.com/is-vitamin-a-in-carrotsyour refs are simplistic misinformation. Read studies if you want to know.
