28 votes
Accepted

Can a camera flash blind the eyes of a baby?

Snopes lists it as unproven. http://m.snopes.com/camera-flash-blind-baby/ The Daily Mail pointed to the unreliable People’s Daily Online as the source of this information, who in turn sourced ...
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  • 9,396
16 votes
Accepted

Can reading fine print cause damage to eyes?

The "damage" done by screens is in the form of eye strain. Your eyeball focuses by using muscles in the eye to change the shape of the lens within the eye, to properly focus incoming light onto the ...
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  • 9,389
11 votes

Can we see a single candle X miles away?

What you described sounds like the Absolute Threshold in neuroscience. It is commonly defined as "The lowest amount of stimulus that a person can detect 50 percent of the time." According to an ...
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  • 111
11 votes
Accepted

Are people physically sensitive to light from LEDs over other sources?

Yes, it is recognised as a potential problem: LED lighting flicker and potential health concerns: IEEE standard PAR1789 update. The IEEE Standards Working Group, IEEE PAR1789 “Recommending practices ...
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  • 1,092
11 votes

Is the solarized color scheme easier on the eyes?

Low contrast modes that rely on colour are not a boon, despite the design trends. Complementary colour contrasts may be perceived as strenuous but overall eye fatigue is reduced and readability ...
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8 votes

Do night driving glasses make it easier to see at night?

Personal test experiment, (more of an extended comment than an answer)... Sometimes I have to drive a four door sedan at night, during times of sporadic traffic, in a town with curvy roads and hills ...
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  • 269
7 votes
Accepted

Do women blink more than men?

A new perspective on spontaneous blinks Ophthalmology 2013 May; 120(5):1086-91 Blink rate was significantly higher in women than in men (P = 0.007, unpaired t test; female, 22.0 ± 16.8 blinks/...
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  • 96.4k
7 votes

Does watching television damage the eyes?

No, watching too much television does not directly cause myopia. Walter Wood has debunked the theory that too much near work causes myopia. In his book The Ultimate Unification of Diet Health and ...
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  • 541
7 votes

Do night driving glasses make it easier to see at night?

There is some fairly old research suggesting that night-driving glasses, i.e. glasses with tinted glass, do not make it easier to see at night, and might even have a detrimental effect. Both acuity ...
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  • 8,466
5 votes
Accepted

Are 1 in 12 men color blind?

Summary: complete colour blindness is very rare (less than 0.01%). What's common is deficiency in red-green colour vision in men, which is around 8% (sex-linked because it's from an X-chromosome fault)...
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5 votes
Accepted

Did Aldous Huxley turn out to be reciting not reading when lecturing on the Bates Method?

Referring to Martin Gardner in the book 'Fads and Fallacies in the Name of Science' Chapter 19 'Throw Away Your Glasses', there had been no changes in the cornea opacity of Aldous Huxley to indicate ...
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  • 22.4k
5 votes

Can we see a single candle X miles away?

This page, which includes relevant calculations, suggests a limit closer to 10km. The calculations compare seeing a candle to seeing a 6th magnitude star. There's additional discussion assuming an ...
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  • 14.9k
5 votes

Does staring at the sun cause significant, permanent harm?

"Permanent damage to the retina has been shown to occur in ~100 seconds" Source: http://scienceline.ucsb.edu/getkey.php?key=3269 A similar statement: "sungazing at bright midnoon for 100 s can ...
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  • 189
5 votes
Accepted

Can we solve most blindness by cadaver donation?

The title of the question asks if most blindness solved by cadaver donation? The World Health Organization states that: According to the latest assessment, cataract is responsible for 51% of ...
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  • 3,394
5 votes

Does using a computer affect your eyesight?

Personal computers are possibly one of the most empowering tool humanity has ever created. They're tools of communication, creativity, and they can be shaped by the user. But, of course they "...
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  • 29.8k
5 votes
Accepted

Does wearing contacts increase the risk of retinal detachment if you receive a blow to the head?

If any study has looked directly at this question, it should not be too hard to find, but I also am not finding it. The only direct expression of professional opinion on this I've found so far is in ...
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  • 7,049
4 votes

Were there army experiments to give humans infrared vision?

There was work done after WWII on this issue. Millard and McCann fed high levels of vitamin A2 to eight medical students at the University of Rochester School of Medicine; the control group of seven ...
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4 votes

Can the UltimEyes app improve distance vision?

Referring to FTC, the California-based marketers Carrot Neurotechnology, Inc. and its co-owners have agreed to stop making deceptive claims that their software application '“Ultimeyes” for mobile ...
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  • 22.4k
3 votes

Is it harmful to your eyes to read in dim light?

No exactly like that, but the lack of outdoor/intense light exposure is an environmental risk factor in developing myopia. This factor is directly correlated with education, at least as currently ...
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  • 49.3k
3 votes

Is looking at an IR transmitter bad for your eyes?

Take a look at the spectrum for sunlight. About half of the energy emitted by the sun is infrared (see citation 6). Some of this is attenuated by the atmosphere, but approx. 30% of the 1000 watts of ...
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  • 1,894
2 votes

Can the human eye distinguish frame rates above 60 Hz?

Critical flicker frequency (the rate at which you can no longer distinguish a flickering light from a constant one) isn't everything. Research during World War II and afterwards using a tachistoscope ...
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  • 2,758
2 votes

Has increased computer use led to increased myopia?

I think Oliver had it right with respect to the most influential environmental factor (light intensity). I was a bit skeptical because near-work was a long-time favorite environmental hypothesis and ...
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  • 49.3k
2 votes

Is there a relationship between yellow and moods?

Color theorists suspect that many color associations emerge from evolutionary ingrained responses to color stimuli (Mollon, 1989 http://jeb.biologists.org/content/146/1/21.full.pdf). Research ...
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  • 22.4k
2 votes
Accepted

Is looking into a solar eclipse especially dangerous?

There is some truth behind this, according to Andrew Young, who cites numerous papers in his research: Thermal damage (not really a “burn”) is possible under conditions of a partial eclipse, when ...
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  • 136
2 votes
Accepted

Can daily disposable contact lenses be safely re-used?

Truth be told, all contacts are prone to buildup of biological materials. I could find no data on whether temporary lenses are more prone to buildup, or are more difficult to clean. To get FDA ...
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  • 5,916
2 votes

Will using auto-darkening welding helmets damage your vision?

I recently watched a YouTube video that held an answer. Auto-darkening helmets are actually permanently opaque to both UV and IR. You can test that by turning them to "grinding" mode, which turns the ...
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  • 1,861
2 votes

Can blue light from LCD panels cause damage to the eyes?

There is no evidence that sitting at a computer screen has any effect on the development of age-related macular degeneration or any other retinal problems except for eye straining referring to Dr. ...
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  • 22.4k
2 votes

Is looking at an IR transmitter bad for your eyes?

Quick answer: it's harmless. Maximum radiation dose is 20 times smaller than the safety limit. Long version: Well it all depends on several factors: spectral characteristic of IR source, beam shape, ...
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  • 31
2 votes

Does the See Clearly Method of vision improvement work?

Basically, no. Eye exercise programs of this kind do not work. Your eyes get enough exercise under normal conditions. There is no evidence that using glasses or contact lenses makes vision worse, and ...
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  • 15.7k
1 vote

Is there a link between strabismus and psychiatric illness?

Disclaimer: I am neither an optometrist nor vision researcher/specialist. The content I reference are lectures that were given at various COVD conferences for those kinds of professionals. I have no ...
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