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post #781 of 793 Old 12-16-2018, 06:54 PM
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Originally Posted by Gamecock24 View Post
Sorry I haven’t replied sooner I’m so busy with family holiday stuff this weekend.
It sounds like you are the perfect person to have this conversation with then. I totally agree astigmatism does sound like a terrible disease. As an Ophthalmologist have you heard about the fuzzy red dot phenomenon before, my eye doctor told me no one had ever mentioned it to him. I haven’t had an eye exam in over a year now so I don’t exactly remember what my Rx is but I do remember the lens curvature in my left eye is almost double that of my dominant right eye so the difference in lenses could be the issue.
Here’s an article I found on the red dot phenomenon which has been widely discussed in the shooting community. https://loadoutroom.com/thearmsguide/36247-2/
Since both the red dot sights and projector rely on bright focused lights to create the image, I’m thinking that my eye focuses the light the same way for both devices with RBE just a side effect for the PJ. It does make me want to know what the percentage of people who see RBE have astigmatism and or wear glasses just to see if there is some correlation there.
I had never heard the phrase "red dot phenomenon," but as I explained in my first post, it seems that Astigmatism would likely be a primary cause. Your link basically says the same thing. Astigmatism is a common finding; the term 'red dot phenomenon' is simply one manifestation in a particular setting.

If a person still experiences some fuzziness in the vision, after a careful refraction to determine the proper glasses prescription, then I would be looking for other causes of blurring in the vision. This could be anything from a Corneal surface irregularity due to dry eye, injury or other factors, to Cataracts, to Macular Degeneration or other Retinal pathology. An Ophthalmologist (not Optometrist) would be the best person to do the exam to identify what is going on.

I would be skeptical about Astigmatism being a factor in why some people see or are sensitive to RBE, but that is just a semi-educated guess. Vision is an incredibly complex phenomenon, with the eye being only one of the links in a variety complicated chain of processing. The complexity of neural circuits and processing that starts in the retina, and continues on through multiple brain regions, would put to shame any of the CPU's or other chips that we use in Home Theater! My guess is that RBE would more likely relate to differences in the processing of a visual image that takes place within various areas of the retina and brain, than on a purely optical process in the eye (which is what Astigmatism is).

Having a significantly different prescription between the 2 eyes has the potential of causing certain visual difficulties. One of these is called "anisokonia" where because of the prescription difference, the image focused on one retina is smaller or larger than on the other eye's retina. The brain can the have some difficulty 'fusing' these 2 images into the usual '3d' perception we're used to. But again, this is an Optical process, and not the first thing I would think of when trying to explain why some people experience RBE.

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post #782 of 793 Old 12-17-2018, 06:32 AM
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DLCphoto the more I experience RBE the more I believe it’s my glasses which are causing RBEs. Because I’m seeing from all different light sources now like an oil diffuser with LED color changing lights, the LED Xmas I was putting up yesterday and other random lights. I’m assuming the rainbow fx has always been there but I just didn’t notice and now since reading about RBE with DLP projectors l was looking for it. The problem is I can’t unsee it. I’m doubting if new glasses will help since I now think the glasses are the actual cause. The RBE does seem to originate from perimeter of the lenses so that’s something I may just have to live with. I know there are some people that would have just blamed the projector for RBE and sent it back while giving it bad reviews but that’s not my nature. In my case now that I’m pretty positive my glasses are the source of the RBE it probably wouldn’t matter what Projector I would have bought because I’d still be wearing my glasses and see the RBE. This has been interesting, I bet you never thought you’d end up in a discussion about astigmatism on the AVS board but it has been informative even if it was a bit over my head.


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post #783 of 793 Old 12-17-2018, 08:02 AM
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Quote:
Originally Posted by Gamecock24 View Post
DLCphoto the more I experience RBE the more I believe it’s my glasses which are causing RBEs. Because I’m seeing from all different light sources now like an oil diffuser with LED color changing lights, the LED Xmas I was putting up yesterday and other random lights. I’m assuming the rainbow fx has always been there but I just didn’t notice and now since reading about RBE with DLP projectors l was looking for it. The problem is I can’t unsee it. I’m doubting if new glasses will help since I now think the glasses are the actual cause. The RBE does seem to originate from perimeter of the lenses so that’s something I may just have to live with. I know there are some people that would have just blamed the projector for RBE and sent it back while giving it bad reviews but that’s not my nature. In my case now that I’m pretty positive my glasses are the source of the RBE it probably wouldn’t matter what Projector I would have bought because I’d still be wearing my glasses and see the RBE. This has been interesting, I bet you never thought you’d end up in a discussion about astigmatism on the AVS board but it has been informative even if it was a bit over my head.
I forgot to include one thought in my last post, that relates to what you're saying here. There can be various types of odd optical effects from glasses, related to the prescription, the type of material the lenses are ground from, the condition of the lenses, etc. So what you're experiencing doesn't sound like actual "RBE", since you're experiencing it with other light sources. RBE is fairly specific to a type of visual disturbance related to a spinning color wheel in DLP projectors. It is my understanding that people with, or without, glasses can experience this, so it would not be coming from your glasses.

So your problem does seem to be more of an optical one, possibly with something else going on inside your eyes (the other conditions I mentioned before). "True" RBE, specific to DLP Projectors, is different, and again my guess is that it would originate in the complex visual processing that takes place within the retina, optic nerve, and brain, rather than having an optical source like glasses.

And new glasses may or may not help, as I suggested above. It could relate to the lens material, lens coatings, condition of the lenses, prescription being up-to-date, sometimes even the size of the frame. If you'd like to get to the bottom of this, I think the next step would be a careful exam with a good Ophthalmologist, explaining to him what you're experiencing.

But the bottom line is that I don't think you're experiencing "RBE" as such.

Glad to discuss this! We had an interesting LASIK related discussion in one of the JVC Projector threads as well!
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post #784 of 793 Old 12-17-2018, 08:55 AM
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I think I do see the RBE when watching the projector because I specifically see RGB when I see the RBE when I see it with the PJ. With other light sources there is usually yellow in the spectrum.
I have polycarbonate lenses with anti glare and transition coatings. The lenses do have a few small scratches but nothing noticeable. I’ve had lenses in the past that were really scratched up and were terrible at night with on coming headlights. I do need an eye exam I didn’t go last year when I should have because I changed jobs and my insurance hadn’t kicked in yet but the Dr said my Rx had stabilized the last time I was there. That’s doesn’t mean it hasn’t changed since though.
I have considered LASIK but haven’t been to a LASIK specialist so I don’t if I’m even a good candidate for it or not. I used to work in a very dusty environment and thought the dust could irritate my eyes so decided to postpone pursuing it. I’ve read about ICL surgery which sounds like I’d be a better candidate for and interests me more bc it in theory is reversible but I don’t believe that procedure is FDA approved in the US.


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post #785 of 793 Old 12-17-2018, 09:14 AM
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I'd just get your eyes checked, and between the Ophthalmologist and the Optician (who knows more about the lenses, coatings, etc.), you should be able to determine if any changes are needed.

Here is a link to my post about LASIK.
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post #786 of 793 Old 02-17-2019, 05:06 AM
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Does anybody here have one of the new JVC Projectors (RS1000/RS2000/RS3000, NX5/NX7/NX9), *and* the Panamorph Paladin DCR Anamorphic Lens?

If so, and if you're up for a visit, please let me know (reply here or pm would be fine), as I'm considering this to upgrade my RS400, and there are a number of things I would like to evaluate in person.

Thanks!

Don

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post #787 of 793 Old 05-10-2019, 07:37 AM
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Just wanted to report on a visit I made to @ereed 's home yesterday. I was there a while back, and he has since made a bunch of upgrades to his audio, beefing up his subs and so forth, as well as making changes in his room, with additional black velvet treatment, sound absorbing panels, moving his screen up to accommodate a sub in the front, etc.

Put simply, his efforts have been quite productive. I thought the sound was excellent, with great imaging, and visceral bass impact, while remaining tight and defined. A significant improvement from what I recall during my last visit, and it sounded very good even then.

We played a bunch of clips from various movies (Greatest Showman, Annihilation, Adrift, U571) and it was quite exhilarating. Very lifelike voices and music, with great surround effect (even without atmos speakers, some sounds seemed to come from above us).

We discussed a possible future change to a scope screen, maintaining his current image height, and just expanding horizontally. This would involve moving a lot of gear, but the greater immersion would be worth it, if there is actually enough space on the sides (we didn't measure or calculate).

Enjoyed it, Eric!
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post #788 of 793 Old 05-13-2019, 07:44 AM
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Thanks @DLCPhoto for coming out to visit again. It was a pleasure catching up from where we left off last time. I know you have made some changes to your system as well and I look forward to checking it out when I head up that direction.
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post #789 of 793 Old 07-01-2019, 02:43 PM
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Would any one be interested in splitting the cost on some full sized Marty flat packs? I already have a full sized Marty, but it's made to be laid down and I do not believe i'll be able to fit it in the new room I'm building(Will be for sale). Looking at getting a 4 pack from https://shop.gsgad.com , I'll be wanting 2 of them. I just moved to King NC 27021, a few months ago. Let me know, Thanks
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post #790 of 793 Old 08-04-2019, 09:33 PM
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Looking for someone NC or SC area to glue together 2 Devastator subs for me this task is a little out my league...inbox me your price

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post #791 of 793 Old 08-06-2019, 06:50 AM
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For those anywhere near Pineville, NC (southern part of Charlotte), there is a launch event for 7 new Martin Logan speakers. I'll be going, and it would be fun to meet some of you IRL if you're available. Thursday, Aug. 22nd, 5 to 9 pm.

PM me for details if you're interested.

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post #792 of 793 Old 08-06-2019, 07:48 AM - Thread Starter
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For those anywhere near Pineville, NC (southern part of Charlotte), there is a launch event for 7 new Martin Logan speakers. I'll be going, and it would be fun to meet some of you IRL if you're available. Thursday, Aug. 22nd, 5 to 9 pm.

PM me for details if you're interested.
Does ML have a home base in Pineville or something?

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post #793 of 793 Old 08-06-2019, 07:56 AM
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Does ML have a home base in Pineville or something?
I believe he is talking about Audio Advice located in Pineville, NC is launching the event.
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