Introduction to Prisms and Beamsplitters - beam splitter prism

 2024-07-07 06:03:31

I have no known allergies to anything, so I am skeptical that this is a material allergy. I just turned off the O2 sensor to see if that is the cause of the irritation. I will report back in a few days on my results.

All technology no matter the size needs to breathe. All of the watches sensors work without you trying to cut off the circulation to your hand. You should be able to put at least one finger, without force, between your band and arm.

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I have an Apple iWatch Ultra2 and have been having similar issues. I have worn a watch on my left hand for most of my life, including several different iWatches, and this is the first time I have experienced anything like this.

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My reason for this post is to see if this condition is very common and whether others have experienced similar issues. Does Apple offer some kind of "fix" for this?

I read several pages of this forum and reddit for some reason it seems to be the heart rate sensor working overly causing this. Or the sensor on the previous watch is faulty. Try to stop heart rate sensor use it and check.

I appreciate all of the comments here in response to my initial post. It should be noted that the situation resolved after the firmware update that was released a few weeks after my message here. Apple never contacted me but there is an obvious difference in the heat and radiation that my watch seems to emit so I am happy and now wear it most of the time.

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That pimple? The author does claim to be a medic but hasn’t noticed that if humans wear watches, rings, spectacles for a long time that the skin and fat become depressed semi permanently. I have grooves behind my ears and dents in my nose from 20 years of spectacle wearing but I don’t complain to Specsavers.

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Until I happened upon this posting I assumed I was just wearing the Ultra2 too tight, so I consistently loosened the band, but that did little to relieve the discomfort.

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Honestly that looks like someone that doesn't know how to wear a watch correctly. You shouldn't be ratcheting down your watch so tightly that it leaves an imprint on your skin. Loosen it up and you should not have that issue.

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After five weeks of wearing the new Ultra 2, I noticed a significant red blotch, reminiscent of sunburn but without any discomfort. Unlike the pinpoint burn blister from the Apple Watch 9, this time it's a 2 cm red patch. As a precaution, I've switched to wearing the watch on my right wrist temporarily. I'll provide updates as the situation progresses.....

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A photo of my wrist is included. Unfortunately, I did not take the photo until I had stopped wearing the watch for about five days at which point the atrophy seemed to be resolving. I should note that I wore a Fitbit for several years prior to the Apple Watch and had to discontinue after developing pain in the wrist and hypertrophy (enlargement) of the distal ulnar head which persists to this day. The pain stopped within days but the hypertrophy has not diminished. I realize that my body may be abnormally sensitive to these things and these conditions may be rare but, in my case, I seem to have clear, objective, changes.

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I had the same issue with 45 mm series 9. Used it almost 15 hours a day including sleep. With in three days, one day woke up and big burn right under the sensor. So moved it on to the right hand for two days then slowly light red color started to form. Returned this and got same another one . Washed the strap and watch with hand soap while the watch is shutdown and after they dried used watch case only for the screen and stopped the heart rate sensor and been using without sleeping in the night yet and no burn in at all.

I have had the exact same issue with my wrist after wearing the Iwatch Ultra for 10 months....I recently exchanged my Ultra for the new iwatch 45 mm model. My wrist has not yet recovered.....

I am a physician Board Certified in Internal Medicine. In October 2022, I purchased an Apple Watch Ultra and began wearing it nearly 24 hours per day taking time off to recharge it every 2-3 days when the battery level reached levels below 20%. Starting April or May 2023, I began to notice a "burning" sensation directly under the watch itself. This sensation felt very much like a mild sunburn localized to that square inch of skin underneath the blood oxygen and heart rate sensors but did not show any discoloration. It was never what I would describe as "painful" but was uncomfortable enough that I was constantly aware of it. I tried loosening the band and taking the watch off entirely for hours at a time without improvement. Beginning about a week ago, I noticed that the skin and/or extensor muscles directly beneath the watch were becoming slightly atrophic (wasting) so I removed the watch completely and have not used it since that time. After 5-6 days not wearing the watch, my skin is not quite as sensitive and the apparent atrophy may be resolving.

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I experimented by moved my Ultra2 to my right hand while my left heals. The picture below is my left wrist after a full week of not wearing the Ultra2. After a few days on my right wrist I started to feel a similar irritation, but nothing noticeable on my skin.

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"I encountered a similar issue with my Apple Watch 9, experiencing a burn blister approximately 6mm in diameter within just two weeks of use. Apple promptly accepted the return, and I opted to upgrade to the Ultra 2 model. I wear it consistently on my left wrist, except during charging sessions. However, my right wrist took some time to fully heal from the initial injury.

May 23, 2023 — Spherical aberration occurs when the surface is not an ideal shape and/or is inaccurate. Parallel beams do not have the same focal point.

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I bought the Ultra 2 watch in October of 2023 I had worn it almost 2 months when I noticed a circular burn mark under the watch. I took a picture of the burn mark because I was shocked that this happened. I took the watch into the Apple Store and had them look at burn mark. They took the watch from me and said they would try and find out why this happened and apologized to me. I am now waiting to hear back from Apple.

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