gkaguirre.bsky.social
Behavioral neurologist and vision scientist at the University of Pennsylvania
https://www.gkaguirre.com/
129 posts
1,218 followers
253 following
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Active Commenter
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It has been really fun working with some amazing people (Zach Kelley & Vincent Lau) to build these. We are finishing work on these devices and starting on data collection. For now, I think these are pretty cool and wanted to share.
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Overall sensory “diet” may influence visual discomfort. We made an all day, wearable light-logger with a fast “world” camera, eye camera, and a “mini spectrometer” that measures wavelengths of light. Do people with migraine and photophobia have different exposure to light wavelengths and flicker?
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We think ipRGC signals may alter trigeminal (face) sensation. These integrating spheres present the light. Nozzles puff air at the corner of each eye, and hidden IR cameras measure the blink reflex. We are testing if light alters blinking and psychophysical touch perception.
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The melanopsin-containing ipRGCs are part of why bright light is uncomfortable. We control the spectral and temporal (“flicker”) content of light to selectively target these cells. The CombiLED has 8, narrow-band LEDs and can produce very bright light.
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@rewaniw.bsky.social has convinced me that I am in error, and that this simply sucks in the now usual manner.
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Ah, I think I mistook a separate list of scheduled CSR meetings as being the register itself. Thanks. This is better news than other scenarios I had imagined.
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Take a look at NPI. I think that is an exception. Both in the register, and canceled.
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I suspect that, if you had accepted the invitation, you would have written yourself a savage critique.
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Congrats! Do you have a link to document? Or is that yet to come?
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Internet hall of fame material.
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A phlegmatic observation, to be sure.
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(Argh, vitreous humor, not aqueous humor)
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A potential source of diopter confusion is that light rays in the eye terminate in a medium (acq humor) with a different refractive index than the start (air). So diopters = RI / focal length.
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Ooof. Some folks produce too much heat, not enough light.
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A great coastal battle was over the organization of the 4th retinotopic, cortical visual area in humans. Split into quarter-fields like the macaque? Or a unified, ventral hemifield representation? Epic stuff, featuring at one point the romantic phrase “venous eclipse”.
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A great coastal battle was over the organization of the 4th retinotopic, cortical visual area in humans. Split into quarter-fields like the macaque? Or a unified, ventral hemifield representation? Epic stuff, featuring at one point the romantic phrase “venous eclipse”.
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Apparently *anterior* lenticonus as a mechanism of accommodation is observed in vertebrates that operate in and out of the water (diving birds, turtles, lizards, sea otters). More generally, the history of the search for the accommodative mechanism during the 1800s is fascinating.
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The narrator intones "these interesting mechanics are not generally known...and have only recently been accepted by science." I don't think these mechanics are accepted by science any more! I am now rather curious about the history of this theory.
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This is great. The end of the video presents the idea that near focus causes transient lenticonus (distortion of the lens from a quadric shape), causing aberrations that serve as a signal for pupil constriction.
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This anagramic error prevented @philplait.bsky.social from obtaining his desired vanity license plate.
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Preach
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I intend to give this a serious try. A new PR670 is $27k, so this would be a remarkable bargain if legit.
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I dream of having a lab credit card, but Penn abolished these after some notorious faculty behavior at our university neighbor. www.cnn.com/2019/10/08/u...
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Thanks for sharing. I happen to be looking to replace an old PR650 right now. Gotta figure out how to get the University to snipe an auction on eBay!
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This is lovely. The "reduce the shape oscillation" feedback procedure is especially clever.
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We are still developing this, but I expect we would get a lot out of a brief chat with you to get some advice. I'll draw David's attention to this exchange...
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As @dbfisch.bsky.social is not an avid poster, I'll respond: David and I are planning to decode semantic content from auditory language in near-comatose states. Your measure strikes me as a nice mid-point between old-school blocked (e.g., animate vs inanimate) and new-school encoding models.
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@dbfisch.bsky.social : My impression is that this is a semantic response that one can derive automatically from data collected while participants listen to language stimuli. Perhaps a potential tool for studying near-comatose states?
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This looks cool as hell. Going to give it a try.
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I love this site. Nearly *20 years ago* I discovered the "Better Bow" knot from Ian's page. I used it when tying my kid's shoes, and it was transformative. Simple to tie, never came undone, but easy to pull and release the knot. I tie it every morning on my own shoes to this day.
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We use code that originated with David Brainard for calibration with the PR650 and PR670: github.com/BrainardLab/...
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It started in the mid 90s but only recently have meetings started alternating outside of the US. @mbeyeler.bsky.social is on the organizing committee, along with Alex Wade, @jorisvincent.bsky.social, @hannahsmithson.bsky.social, and a similarly great cast of characters.
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The Fall Vision Meeting (@optica-fvm.bsky.social) is a great place for “translational” vision science (e.g., retinal imaging —> psychophysics —> clinical disorders). 2024 was in York, UK.
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It is a delight to find you here. I will adjust my Bayes pun prior accordingly.
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Blocking this neuro-BS account; his oxytocin levels are about to take a hit...
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Receptive aprosody is clearly worse. Like, understanding sarcasm isn’t that important, right? 🙄
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Unaware that the whole cortex has no glia whatsoever. Problematic!! Unfollowing cortex now
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I've been saying for years that the frontal lobe is totally overrated. Left brain / right brain? Who cares. I'm on team posterior brain.