Tag

Vision

All articles tagged with #vision

science2 days ago•38 min saved

The Ultraviolet Blind Spot: How Evolution Shaped Human Vision

Humans can’t see ultraviolet light because the eye’s cornea and lens absorb most UV radiation before it reaches the retina. Evolution favored eye protection from UV damage, leaving our photoreceptors tuned to the visible spectrum. By contrast, many other animals have UV-sensitive visual systems, which helps them detect flowers, prey, or mates that reflect UV patterns. The article explains how this filtering works, why UV perception is advantageous for some species but not humans, and what this tells us about how vision has evolved in different lineages.

via Forbes|

#biology #evolution #eyes

business19 days ago•38 min saved

Ted Turner's Vision Blueprint: A 1982 Lesson in Bold Leadership

A 1982 encounter with Ted Turner, the CNN founder, taught the author to craft a bold, future-focused vision, use storytelling to rally a team, and stay disciplined toward long-term goals rather than chasing short-term wins, shaping his approach to building media ventures.

via Forbes|

#business #cnn #leadership

science1 month ago•5 min saved

Eyes Open and Eyes Open Video: Visual Cues Boost Hearing in Noise

A study with 25 volunteers found that keeping eyes open and viewing related visuals enhances hearing in noisy environments, while closing eyes makes it harder to detect sounds. EEG data showed eye closure increases suppression of background noise, whereas visual input—especially videos—helps anchor auditory perception. Participants were tested under four visual conditions (eyes closed, blank screen, still image, video) with several target sounds in 70 dB noise, revealing progressively better detection with more engaging visuals. The work, published in The Journal of the Acoustical Society of America, suggests visual engagement can improve auditory sensitivity even in noisy settings.

via ScienceAlert|

#acoustics #eeg #hearing

science1 month ago•3 min saved

Sight Restored: Gene Therapy Breakthrough Wins Major Science Prize

A married couple and investigator Katherine High share a $3 million Breakthrough Prize for Luxturna, the gene therapy approved in 2017 that restores vision in people with Leber congenital amaurosis by delivering a working RPE65 gene to retinal cells; the 25-year project produced dramatic patient improvements and was celebrated at a Los Angeles ceremony, while scientists warned about politicized attacks on science and other prize-winning work highlighted advances in gene therapies for blood disorders.

via The Guardian|

#breakthrough-prize #gene-therapy #leber-congenital-amaurosis

technology2 months ago•78 min saved

Unlock ChatGPT's Power: 7 Hidden Features You Might Be Missing

Tom's Guide highlights seven ChatGPT features—Memory, Prompt iteration, Voice mode, Vision, Canvas, Apps, and Projects—that transform it from a simple Q&A tool into a collaborative AI partner, noting many users quit before leveraging these capabilities and encouraging ongoing prompts and exploration to boost productivity.

via Tom's Guide|

#ai #canvas #chatgpt

health3 months ago•25 min saved

Tattoo Ink Linked to Sight-Threatening Eye Inflammation in Australia

Australian doctors document about 40 cases of tattoo-associated uveitis, an inflammatory eye condition where the immune response to tattoo pigments far from the eye can inflame ocular tissue, risking glaucoma or permanent vision loss; early diagnosis and safer pigments could prevent damage, while treatments like steroid eye drops help some patients and others have suffered irreversible vision loss.

via ZME Science|

#australia #health #immune-system

health3 months ago•15 min saved

Dim Indoor Light May Be Fueling the Global Myopia Boom

A SUNY College of Optometry study published in Cell Reports suggests that dim indoor lighting combined with prolonged close focus may excessively constrict the pupil and reduce retinal illumination, potentially contributing to the global rise in nearsightedness; the idea is still speculative and requires more testing, but it could influence prevention strategies.

via Gizmodo|

#eye-health #health #lighting

science3 months ago•3 min saved

Twilight Zone Fish Unveils Hybrid Photoreceptor, Redefining Vision

Researchers studying deep-sea fish larvae in the mesopelagic 'twilight zone' have found a third photoreceptor that blends cone-like molecular machinery with rod-like shape, a hybrid eye that can detect faint light and bioluminescent signals, challenging 150 years of vision theory that sight relies only on rods and cones. The study, led by Dr. Fabio Cortesi and published in Science Advances, suggests vertebrate vision may involve more than the classic two photoreceptor types.

via The Daily Galaxy|

#deep-sea #hybrid-photoreceptor #mesopelagic

science3 months ago•5 min saved

Eye's Blind Spot May Point to How Consciousness Emerges

Researchers at the University of Glasgow are testing whether the eye’s blind spot—where the optic nerve enters the eye—can illuminate how consciousness arises by evaluating Integrated Information Theory and predictive-processing models, mapping individual blind spots and using eye-tracking to see how the brain fills perceptual gaps and creates a seamless sense of reality.

via Indian Defence Review|

#blind-spot #consciousness #neuroscience

healthcare3 months ago•10 min saved

MHRA warns Ozempic/Wegovy could cause rare eye condition

Britain's MHRA has warned that the diabetes/weight‑loss injections Ozempic (semaglutide) and Wegovy may cause a rare optic nerve condition (NAION) that can lead to sudden vision loss in one eye. The regulator has received three reports, but says the overall risk is very small; with about two million UK users, patients and clinicians are advised to be alert to symptoms and seek urgent eye care if vision changes occur. The warning also notes that pancreatitis is a known but infrequent side effect of GLP-1 weight‑loss drugs.

via The Times|

#healthcare #mhra #naion

health3 months ago•45 min saved

Diabetes Drug Metformin Linked to Slower Age-Related Vision Loss

A Liverpool study of about 2,000 adults with diabetes aged 50+ found that those taking metformin had 37% lower odds of developing intermediate age-related macular degeneration (AMD) over five years compared with non-users, suggesting metformin might help slow age-related vision loss. However, researchers caution that the findings are observational and do not prove causation or support using metformin to treat AMD outside of diabetes; clinical trials are needed to confirm any benefit.

via Healthline|

science4 months ago•50 min saved

Your nose hides in plain sight: how your brain ignores it

Despite being always in your field of view, your nose largely disappears from conscious sight because the brain habituates to constant stimuli and filters out familiar inputs, so you only notice it if you deliberately focus on it or change your viewpoint.

via Live Science|

#attention #brain #nose

science4 months ago•6 min saved

Greenland sharks aren’t blind after all — and science is only beginning to unravel their ages and migrations

Scientists show Greenland sharks have structurally intact retinas capable of detecting light, overturning the long-held belief that they are blind and ultra-long-lived. The research also prompts reevaluation of their age estimates and highlights major gaps—especially in understanding reproduction and migratory behavior—as warming Arctic waters could reshuffle their habitats and conservation needs.

via The Guardian|

#aging #arctic #greenland-shark

science4 months ago•3 min saved

Centuries-Old Greenland Sharks Reveal Enduring Night Vision

Researchers studying Greenland sharks aged over a century find a preserved, functional visual system: their retinas lack cones, but rod-based vision uses rhodopsin tuned to blue light (458 nm), and corneas continue to transmit most light. The findings hint that a DNA repair toolkit linked to extreme longevity may help maintain retinal health, with unclear implications for human eye health; study published in Nature Communications.

via ScienceAlert|

#greenland-shark #longevity #retina

science5 months ago•3 min saved

Reindeer Eyes Adapt Remarkably for Winter

Reindeer eyes change color with the seasons, turning deep blue in winter to adapt to the low-light Arctic environment, possibly functioning as natural sunglasses by reflecting more blue light to enhance vision in darkness, a unique and reversible adaptation involving structural changes in the eye's tapetum lucidum.

via ScienceAlert|

#arctic #eyes #reindeer