Wow, cool stuff! But no, its much closer to the center, and it's not something I can really spot. I just know that it started after I dealt a bit with newly bought "high power" leds. Not really high power and I never really looked directly into them (them facing at me). It also might have been some bright, red ones on breadboards. Happened over 10 years ago.
You may be able to better pin it down along sharp contrast lines, maybe moving, or flickering patterns. Eg. a black and white grid, stripes, or small checkerboard pattern on an LCD screen. And of course isolate eyes for these tests.
Your brain can fill in a lot of voids before you notice, especially for monotonous areas and static impressions (as mentioned the blindspot or the blood vessels on your retina are usually "invisible" until you provoke awareness through unusual lighting changes, or defined peripheral accounting experiments). You likely won't notice acquired "blindspots" looking at a white wall, or chaotic fallen leaves on the ground, especially where the other eye provides missing information, but at the edges of highly predictable patterns, one eye closed at a time, you may trick your brain to fuck up, eg. blur or indent otherwise clearly defined areas, when it can't decide which color to fill. Reading texts with on eye closed may also highlight "dancing" letters or distortions around your center of vision.
Worth noting, such defects may be caused by progressive conditions like retina detachment or even ocular melanoma, and the association with laser/light accidents may be incidental. If you spot a spot, do not brush it off as a limited loss! Have it checked, even with a likely attributable cause. You may prevent full blindness through medical intervention in case of disease!
Edit: You can see the blood vessels when you look a white wall and steadily move a (smartphone) flashlight in and out of the field of vision, slowly waving the light next to your head, illuminating from your ears to the side of your nose and consequentially your eyes at a shallow angle. This will cause an unusual blood vessel shadow, now meandering through your vision. The blood vessels are also very visible during eye examinations when the doctor moves the slit lamp around (go check it out ;)
Very weird seeing the insides of the very eye seeing, by ... well ... seeing.
Some of my earliest memories are of these kinds of perception, including the 'phosphenes' caused by internal pressure on the eyes when one looks to the side (they appear as fleeting, roundish flashes). It's curious to me that such formative memories would be triggered by something entirely 'internal' - not a measure of external stimulus involved. Perhaps in a similar way, someone else's earliest memory might be that of becoming aware of their heart beating!
Optometrists have cameras that can take pictures of your retina and see if there's any obvious damage. You might consider getting your eyes checked out.
They won't see "dead pixels" unless it's severe damage, or a different underlying cause. All bets are off on the optical nerve, since MRI resolution may at best allow to spot a tumor.
They can, however, do an extended version of the blind spot experiment above for the whole field of vision, where they project light dots into a hemisphere in an unpredictable but iteratively somewhat exhaustive fashion. Very tiring and challenging test, since you need to keep your eyes from wandering, fixated at a boring reference point for more than half an hour. Like a hearing test, but for your eyes...
Laser beams or high energy radiation in general may also damage vision elsewhere in the optical pathway. Like opacification in the cornea or vitreous body when proteins get denatured by the heat. The body is very bad a repairing any damage in the optical apparatus since the eyes do have their own blood barrier, so macrophages usually don't have access to clean up "junk", and most tissues involved aren't really regenerative. Worse, damaged proteins tend to slowly spread the faulty structure to their neighbors.
Make a grid in a drawing program with crosshairs in the centre.
Close one eye.
Keep looking at the crosshairs.
Scan from the central focus point using your mouse and click when you can't see the mouse cursor.
With a bit of trial and error you should be able to map out large regions you can't actually see in.
(My dad did this years ago for a retinal detachment spot in his one eye.)
More importantly: get an optometrist to check out your retina.
I’d be surprised if you damaged your eyes with any LEDs in the visible spectrum. Walking around in midday sun exposes you to orders of magnitude more energy. Maybe if you had focusing lenses on them, and they were really high power, like the kind that needs heat sinks to operate safely.
If you had say UV LEDs, all bets are off since it wouldn’t trigger the pupillary light reflex to close down the iris.
Some white LEDs are actually near-UV LEDs coated with a phosphor layer to emit visible wavelengths. Could be GP got LEDs with poor coating allowing UV through?
