The original poster experiences eye strain and discomfort despite having a seemingly correct eyeglass prescription. They describe feeling like their eyes are constantly working hard, even with glasses, and are curious if others have similar experiences. They've explored various avenues, including multiple eye exams and different types of lenses, but haven't found a solution. They wonder if factors beyond a standard prescription, like subtle misalignments or focusing issues, might be the cause.
Researchers attached miniature cameras to cuttlefish to study their hunting strategies and camouflage techniques from the prey's perspective. The footage revealed how cuttlefish use dynamic camouflage, rapidly changing skin patterns and textures to blend with the seafloor, making them nearly invisible to unsuspecting crabs. This camouflage allows cuttlefish to approach their prey undetected until they are close enough to strike with their tentacles. The study provides a unique viewpoint on predator-prey interactions and sheds light on the sophistication of cuttlefish camouflage.
HN commenters discuss the amazing camouflage abilities of cuttlefish, with several expressing awe at their dynamic skin control and hunting strategies. Some debate the cuttlefish's intelligence and awareness, questioning whether the camouflage is a conscious act or a reflexive response. Others focus on the crab's perspective, speculating about its experience and whether it notices the changing patterns before being attacked. A few comments delve into the mechanics of the camouflage, discussing chromatophores and the speed of the skin changes. One user highlights the co-evolutionary arms race between predator and prey, noting the crab's evolved defenses like shells and quick reflexes, while another mentions the ethics of keeping cephalopods in captivity for research.
Exposure to 670nm red light significantly improved declining mitochondrial function and color vision in aged fruit flies. The study found that daily exposure for a short duration revitalized the photoreceptors' mitochondria, increasing ATP production and reducing oxidative stress. This led to demonstrably improved color discrimination ability in older flies, suggesting a potential non-invasive therapy for age-related vision decline.
HN commenters discuss the study's small sample size (n=24) and the lack of a control group receiving a different wavelength of light. Some express skepticism about the mechanism of action and the generalizability of the results to humans beyond this specific age group (67-85). Others are intrigued by the potential benefits of red light therapy, sharing anecdotal experiences and links to related research, including its use for wound healing and pain relief. Several commenters highlight the affordability and accessibility of red light devices, suggesting self-experimentation while cautioning against potential risks and the need for further research. There's also discussion around the placebo effect and the importance of rigorous scientific methodology.
Summary of Comments ( 157 )
https://news.ycombinator.com/item?id=43291922
Several commenters on Hacker News shared similar experiences of discomfort despite having supposedly correct prescriptions. Some suggested the issue might stem from dry eyes, recommending various eye drops and eyelid hygiene practices. Others pointed to the limitations of standard eye exams, proposing that issues like binocular vision problems, convergence insufficiency, or higher-order aberrations might be the culprit and suggesting specialized testing. A few mentioned the possibility of incorrect pupillary distance measurements on glasses, or even the need for progressive lenses despite being relatively young. Overall, the comments highlighted the potential gap between a "correct" prescription and true visual comfort, emphasizing the importance of further investigation and communication with eye care professionals.
The Hacker News post "Ask HN: Do your eyes bug you even though your prescription is 'correct'?" generated a robust discussion with numerous comments exploring the nuances of eye strain, prescriptions, and ophthalmological practices.
Several commenters shared similar experiences of discomfort despite seemingly accurate prescriptions. One recurring theme was the distinction between a technically correct prescription and a truly comfortable one. Some pointed out that standard eye exams might not capture all the subtleties of visual function, like how the eyes work together, focusing at different distances, or dealing with varying light conditions. One commenter mentioned the importance of binocular vision testing and how misalignment, even minor, could lead to strain. Another discussed how even small changes in prescription, while technically within the "correct" range, can significantly impact comfort.
Another thread focused on the potential limitations of automated refraction systems. Some commenters expressed a preference for subjective refraction performed by a skilled optometrist or ophthalmologist, emphasizing the importance of patient feedback in fine-tuning the prescription. This sentiment was echoed by several others who found that automated systems provided a good starting point but often required further refinement through manual testing.
Several specific conditions and contributing factors were mentioned, including dry eye, astigmatism, convergence insufficiency, and computer vision syndrome. Commenters recommended exploring these possibilities with an eye care professional. The importance of regular breaks from screen time and proper workplace ergonomics were also highlighted as potential remedies for eye strain. Specific suggestions included the 20-20-20 rule (looking at something 20 feet away for 20 seconds every 20 minutes) and ensuring proper screen placement and lighting.
Some commenters shared positive experiences with alternative approaches like vision therapy, which aims to improve visual skills and coordination. Others discussed the potential benefits of specialized lenses, like prism glasses, for addressing specific visual issues.
A few commenters cautioned against over-correcting vision, emphasizing the importance of finding the minimum effective correction. They pointed out that excessive correction could lead to adaptation and potentially worsen eye strain in the long run.
Overall, the comments section provides a rich tapestry of personal experiences, practical advice, and potential explanations for why eyes might feel strained even with a "correct" prescription. It highlights the complexity of vision and the importance of open communication with eye care professionals to find truly comfortable and effective solutions.