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No. And it might help to have someone with a background in science and optics answering this instead of folks repeating random stuff they were told in sales pitches at the sunglass shop. All tinted lenses will diminish the amount of light reaching the eye, blue and otherwise. Blue lenses would simply allow some more blue light through- no more than wearing clear lenses, or no lenses whatsoever. The biggest negative effect of a blue lens would come in situations involving depth perception- blue lenses will make the perimeter of objects appear "softer" and more out-of-focus, and as a result, can effect depth perception. Blue lenses will have zero factor in so called "blue light" or "HEV light" damaging the eye. There is also a growing body of evidence that the "blue light scare" has been blown out of proportion by lens manufacturers (most notably Essilor, a lens conglomerate that controls the majority of all prescription lens manufacturing in the world- yes, the world) in order to sell HEV "filters" that cost significantly more than standard anti-reflective lens treatments. While blue light can and will cause eyestrain and can effect circadian rhythms leading to sleep disturbance, it's looking more and more like it takes a greater amount of HEV to have these effects and that its long-term harm has been overexaggerated. TLDR: I have almost ten years experience in the optics field and a BS with a minor in biology. Blue sunglasses are not "bad" for you. I wouldn't drive with them though.
No, watching TV too close will not damage your eyes. While many people like your mother say it does harm to your eyes when sitting closer than necessary to the television, but the truth is that it will not damage your eyes. Generally speaking, sitting too close to watch TV may give you a headache, but it will not damage your vision. Because Modern TVs do not emit harmful radiation, so eye damage due to radiation is also not an issue. As with sitting too close to the television, you may get a headache from reading in the dark and eye strain, but it will not weaken your sight. Next time, when your mother tells you again, I think you can tell her.
First off this is not a stereotype or assumption. It's a blatant fact that a lot of Chinese people need to wear glasses/contacts compared to other races. Personally I think the reason are below: firstly, most Chinese people would love to stay at home to play computers or watch TV. All of those activities are not good at the development of the eyes. However, it will cause the eyes fatigue and further cause the vision loss. Secondly, a lot of Chinese student are assignment much homework which should be done with the help of computers. In fact, the people have much outdoor activities, which will help with the eye development and has a low rate to get vision impairment. Hope this helpful.
They work totally differently. Some people think that colored contacts can work the same as sunglasses. But actually the center of the colored contacts are also transparent so then lenses can't color what we saw. If we move your eyes, we may see some colors in the dege of our vision but the color won't cover our vision as sunglasses often do.
This may be late but I also get headaches from polarized sunglasses. I had a pair of Raybans and my headache went away when I took them off. I was in the sun (this happened a few times) and I started getting a major pressure headache and once I took them off, my headache started going away. I think their may be a connection between polarized sunglasses and headaches. The glasses fit perfectly and they actually felt like I wasn't wearing anything, so it wasn't discomfort from the glasses. Short-term is fine but when it comes to long-term, my head starts to hurt.
It is widely acknowledged that contact lenses are safe to our eyes. However, a long time wearing can contribute to severe eye problems, such as redness in eye, pain and unwell in eye, even allergic eyes. Although you think that you have already washed your hands clean, the germs are hard to be seen and removed. So a large number of germs are the factor to lead to allergic eyes.
Place one lens on your right index finger with all edges up.Use left hand to lift your upper eyelid open and right middle finger to hold the lower eyelid. Gently place the lens on your left eyeball while looking into the mirror.Then move your eyeball with eyes open to place the lens in the right position.Finally close your eyes slowly.Do the other lens as the same way.
Yes, honey will cure your dry eyes because of the inner moisture function. You could drink the honey water. Or you could also adopt some honey on the surface of your eyes to make your eyes get moisture. That is the good way which is so effective. You could have a try. At the same time, eating more food with vitamin C could also be helpful for your dry eyes.
The flashes of light in your eyes are caused by the traction on the retina from the vitreous jelly which is the major part of the back of the eyeballs and connected to the retina. There are people who are in the same condition as you have spots in the vision that follow the same movement of the eyeballs. Your problem may be vitreous floaters. Actually, the flashes or floating things are small pieces of vitreous jelly. When you move your eyes or rub your eyes, some fibrous bands of the liquefied jelly detach from the back of the eyes and flow. If you are experiencing excessive and continual floaters, drastically vision decline or inability to see light through, you should see your ophthalmologist so as to avoid retinal detachment.
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