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1

I won't discuss the aspects that the other two answers have covered well. I am very near-sighted. For my non-sunglasses, I have what are called "progressives". I think this is what you are calling bi-focal, multi-focal. For my sunglasses, I skipped the progressive feature, which I don't find very useful anyway. Outdoors, I am focused on distance almost ...


2

I'm an extremely nearsighted person who has trouble with contacts and spends a whole lot of time being active outdoors. As a result, I've done a lot of investigating into prescription sunglasses, and tested several pairs. The biggest difference between sunglasses and regular glasses is that sunglasses need to block out a larger area than a regular glasses ...


2

I like the idea of glasses that change from sunglasses to indoor Photochromic lenses are a lot less useful than most people think when they hear about the concept. The main problem is that the change takes time - about a minute to darken and nearly five minutes to un-darken. That makes them basically useless for things like tunnels. Another problem is that ...


1

Being at fault has nothing to do with the decision. If you are in trouble and cannot extricate yourself without risk to life or making your injuries more serious, you push the button, cost be dammed.


0

I have low blood pressure and hypothyroidism and traveled twice to Bogota, Colombia (alt of 8,600 feet). Both times I was severely sick for three days with migraine and vomiting compared to others with normal blood pressure. There has to be some connection between low blood pressure and severe altitude sickness.


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Here is a reliable medical source of the causes, symptoms and advised medical responses for altitude sickness of varying degrees. Cleveland Clinic - Altitude Sickness information Altitude Sickness Explanation Altitude sickness can affect anyone who goes to high altitudes without giving the body time to adjust to the changes in air pressure and oxygen ...



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