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Averted vision and Post Stroke Vision issues.

Discuss deep sky objects.
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Gulf Coast Guy
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Averted vision and Post Stroke Vision issues.

#1

Post by Gulf Coast Guy » Sun Jun 30, 2019 8:54 pm

I'm about to jump back into observing again after a stroke has taken a marginal bite out of my vision. The left periphery of the field for both eyes took the hit. It's a brain thing; the eyes themselves are fine. I'm going to need to teach myself to try to cope by try to keep my observations straight on and retrain myself to force any averted vision observations into the less affected regions.
Averted Vision was never a skill I Had considered I had mastered so I my ask for some advice from time to time.
Any thoughts would be welcome and thanks to any and all in advance.


GCG
OTA's: 203mm f10 Meade SCT (LXD75); Antares 80mm Refractor w/William Optics APOGrade f6.9 objective; Orion Starseeker 80 f11.2 Refractor
Mount/tripod's: Meade LXD-75 EQ; Orion Starseeker IV ALT/AZ; Celestron Heavy Duty ALT/AZ Farpoint UBM (Universal Binocular Mount)
Eyepieces:Meade - 26mm plossl, 12mm Astrometric; GSO (OPT badge) 2" Superview 50mm & 30mm 1.25" 15mm; TMB Planetary Series 9mm, 6mm, & 4mm: 10mm & 23mm 60° that came with the 80mm f11.2
Barlows: Orion 2x Shorty; Meade 4000 Series 3x
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#2

Post by Michael131313 » Sun Jun 30, 2019 11:51 pm

Hi GCG. I do not have an answer to your question, but I sure wish you the best.
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Gulf Coast Guy
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#3

Post by Gulf Coast Guy » Mon Jul 01, 2019 1:23 am

Michael131313 wrote:
Sun Jun 30, 2019 11:51 pm
Hi GCG. I do not have an answer to your question, but I sure wish you the best.
Thanks, Buddy; I can use all the positive energy I can get. Good thing I'm too pig-headed to give up.
OTA's: 203mm f10 Meade SCT (LXD75); Antares 80mm Refractor w/William Optics APOGrade f6.9 objective; Orion Starseeker 80 f11.2 Refractor
Mount/tripod's: Meade LXD-75 EQ; Orion Starseeker IV ALT/AZ; Celestron Heavy Duty ALT/AZ Farpoint UBM (Universal Binocular Mount)
Eyepieces:Meade - 26mm plossl, 12mm Astrometric; GSO (OPT badge) 2" Superview 50mm & 30mm 1.25" 15mm; TMB Planetary Series 9mm, 6mm, & 4mm: 10mm & 23mm 60° that came with the 80mm f11.2
Barlows: Orion 2x Shorty; Meade 4000 Series 3x
Binoculars:Brunton 10x50 Celestron Skymaster 15x70 Oberwerk 25x100 IF delux
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#4

Post by quincy » Mon Jul 01, 2019 1:42 am

Have your doctor give you any options?
I read about eye therapy, but never tried it out myself.
Here's a quick link: https://www.flintrehab.com/2017/treatme ... er-stroke/

I've suffered two strokes myself. The first one made me a mumbling idiot for some time. Had to read, write and speak all over again.
The second made me lose the dexterity of my left index finger.
I feel for your issues.
Jim


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#5

Post by Gulf Coast Guy » Mon Jul 01, 2019 2:21 am

quincy wrote:
Mon Jul 01, 2019 1:42 am
Have your doctor give you any options?
I read about eye therapy, but never tried it out myself.
Here's a quick link: https://www.flintrehab.com/2017/treatme ... er-stroke/

I've suffered two strokes myself. The first one made me a mumbling idiot for some time. Had to read, write and speak all over again.
The second made me lose the dexterity of my left index finger.
I feel for your issues.
Thanks for the link I'll check it out.

One is enough - really. I go back to the Neuro Opthamologist for another full field scan in August. I'll know more then.
OTA's: 203mm f10 Meade SCT (LXD75); Antares 80mm Refractor w/William Optics APOGrade f6.9 objective; Orion Starseeker 80 f11.2 Refractor
Mount/tripod's: Meade LXD-75 EQ; Orion Starseeker IV ALT/AZ; Celestron Heavy Duty ALT/AZ Farpoint UBM (Universal Binocular Mount)
Eyepieces:Meade - 26mm plossl, 12mm Astrometric; GSO (OPT badge) 2" Superview 50mm & 30mm 1.25" 15mm; TMB Planetary Series 9mm, 6mm, & 4mm: 10mm & 23mm 60° that came with the 80mm f11.2
Barlows: Orion 2x Shorty; Meade 4000 Series 3x
Binoculars:Brunton 10x50 Celestron Skymaster 15x70 Oberwerk 25x100 IF delux
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#6

Post by Ozypic » Mon Jul 01, 2019 7:08 am

Hmmmm what a pain for you . Hope it hasn't affected your driving licence etc. Maybe by August it will have improved. I suppose its going to be lots of those darn eye exersises . Best of luck with it .Phill
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#7

Post by Gulf Coast Guy » Mon Jul 01, 2019 1:12 pm

After the first field scan the doctor came into the examining room,ploped down in a chair and said simply; well, you're not driving.I already knew that. I've been back at work since May13 and I've seen improvement, just won't know for sure til that next scan. --- we'll see.
OTA's: 203mm f10 Meade SCT (LXD75); Antares 80mm Refractor w/William Optics APOGrade f6.9 objective; Orion Starseeker 80 f11.2 Refractor
Mount/tripod's: Meade LXD-75 EQ; Orion Starseeker IV ALT/AZ; Celestron Heavy Duty ALT/AZ Farpoint UBM (Universal Binocular Mount)
Eyepieces:Meade - 26mm plossl, 12mm Astrometric; GSO (OPT badge) 2" Superview 50mm & 30mm 1.25" 15mm; TMB Planetary Series 9mm, 6mm, & 4mm: 10mm & 23mm 60° that came with the 80mm f11.2
Barlows: Orion 2x Shorty; Meade 4000 Series 3x
Binoculars:Brunton 10x50 Celestron Skymaster 15x70 Oberwerk 25x100 IF delux
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#8

Post by helicon » Mon Jul 01, 2019 2:02 pm

Good luck with the rehab and sorry you had to go through the experience, I'm hoping you will be able to re-train your brain so that averted vision is still possible.
-Michael
Various scopes, 10" Zhumell Dob, ES AR152, AWB 5.1" Onesky newt, Oberwerk 25x100 binos, two eyeballs
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#9

Post by Lady Fraktor » Mon Jul 01, 2019 2:48 pm

Good luck with the recovery, hopefully things will improve more as you go forward.
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#10

Post by jrkirkham » Mon Jul 01, 2019 4:08 pm

We wish you all the best for full recovery.
Rob
Telescopes: 50mm refractor, ED80 triplet, 90mm makcass, 4.5" reflector, 10" dob, 8"SCT
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#11

Post by Gulf Coast Guy » Mon Jul 01, 2019 7:53 pm

After some searching I found Mel Bartel's very usefull illustration.

Image

I'm left eye dominant.
OTA's: 203mm f10 Meade SCT (LXD75); Antares 80mm Refractor w/William Optics APOGrade f6.9 objective; Orion Starseeker 80 f11.2 Refractor
Mount/tripod's: Meade LXD-75 EQ; Orion Starseeker IV ALT/AZ; Celestron Heavy Duty ALT/AZ Farpoint UBM (Universal Binocular Mount)
Eyepieces:Meade - 26mm plossl, 12mm Astrometric; GSO (OPT badge) 2" Superview 50mm & 30mm 1.25" 15mm; TMB Planetary Series 9mm, 6mm, & 4mm: 10mm & 23mm 60° that came with the 80mm f11.2
Barlows: Orion 2x Shorty; Meade 4000 Series 3x
Binoculars:Brunton 10x50 Celestron Skymaster 15x70 Oberwerk 25x100 IF delux
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#12

Post by Gulf Coast Guy » Sat Jul 06, 2019 2:57 pm

I've asked Bladekeeper for permission to use some of his images to make what I hope are workable Averted vision training aids. In each image I've added 4 green dots in the 2:00, 4:00,8:00, and 10:00 positions relative to the subject. The point is to ID an Averted vision target. Persons with right eye dominance would use 2:00 and 4:00; persons with left eye dominance would use 8:00 and 10:00

M13
ImageM13 AV Train by pat w1, on Flickr

M80
ImageM80 AV Train by pat w1, on Flickr

What I need is someone with better skills in the area than my own to assess the images and give me an idea of their usefulness.
OTA's: 203mm f10 Meade SCT (LXD75); Antares 80mm Refractor w/William Optics APOGrade f6.9 objective; Orion Starseeker 80 f11.2 Refractor
Mount/tripod's: Meade LXD-75 EQ; Orion Starseeker IV ALT/AZ; Celestron Heavy Duty ALT/AZ Farpoint UBM (Universal Binocular Mount)
Eyepieces:Meade - 26mm plossl, 12mm Astrometric; GSO (OPT badge) 2" Superview 50mm & 30mm 1.25" 15mm; TMB Planetary Series 9mm, 6mm, & 4mm: 10mm & 23mm 60° that came with the 80mm f11.2
Barlows: Orion 2x Shorty; Meade 4000 Series 3x
Binoculars:Brunton 10x50 Celestron Skymaster 15x70 Oberwerk 25x100 IF delux
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#13

Post by Max Nomad » Mon Jul 08, 2019 10:53 am

Hope your recovery continues to progress well. To contribute to the great advice that has already been posted, here's something I found in the FAA's Pilot's Handbook of Aeronautical Knowledge - Chapter 17 Aeromedical Factors:

"Night Blind Spot
It is estimated that once fully adapted to darkness, the rods are 10,000 times more sensitive to light than the cones, making them the primary receptors for night vision. Since the cones are concentrated near the fovea, the rods are also responsible for much of the peripheral vision. The concentration of cones in the fovea can make a night blind spot in the center of the field of vision. To see an object clearly at night, the pilot must expose the rods to the image. This can be done by looking 5° to 10° off center of the object to be seen. This can be tried in a dim light in a darkened room. When looking directly at the light, it dims or disappears altogether. When looking slightly off center, it becomes clearer and brighter."

https://www.faasafety.gov/files/events/ ... _Ch_17.pdf
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