Obligatory not an OD.
strelok. IF you are preparing to make these in SHTF you probably wan't the frame to be resilient and sturdy. Or cheap and easy to make.
How heavy is your prescription strelok? If you are noneyes like me you will need to use full frames and not half frames, since my glass is almost 1/4 inch thick. You can get away with half frames but they are usually shit and break easily.
>My lenses are trapezoidal and yes I have my prescription. I'm guessing sports glasses has to do with how far up the bridge of my nose they are seated all the way up the bridge of my nose snugly.
Negative. IT's due to the closed distance to the eye and lens they need to recalculate the prescription (usually lightening it) to compensate for reduced distance.
First off, you might want to make a mold or a rough approximation of the distance between your nose (also known as Pupilary difference). There's several methods (Eye to eye, eye to nose), If you are using progressives/sports glasses you will need to be accurate or they will fuck your shit up. Far eyesightedness (hyperopia) you minus 3-4 from your PD iirc (rough estimate, depends on perscription....) . Or get a friend to help you out.
> What metal would you recommend making fixed frames from?
As for frames, you want it to be light and sturdy, or easily replaceable. Wood, plastic do well when you have a thin metal rod in the frame legs so it doesn't warp (as much). Titanium (yes, I have a pair ) are expensive but damage resistant and can be bent and molded back into shape. Otherwise, usually plastic/ aluminium. A couple things to keep note of:
> nose bevels break easily, if you are feeling ambitious make them fixed
> Make sure the glasses are in the correct aligment in the x and y plane or else it will cause headaches and fuck with your vision (YES. SOME COMPANIES MAKE SHITTY LENSES THAT ARE NOT PERFECTLY PERPENDICULAR!!) Make sure you are checking it is perpendicular at the center of the lens, not the area around.
>Consider if you wish to hold your lens in with glue (most people) or screws, MAKE SURE YOUR LENS DOES NOT SHATTER WITH THESE (Some shit lenses will)
>If you want to prepare for the rekoning, make a little "ledge" that hangs over your lenses so you can attach strips of cloth or foilage to break up your glass reflection so you don't get drone struck by BLM ISIS while innawoods without damaging the lens
>Consider drilling a pair of holes at the end so you don't loose your glasses when you are sweaty and fall over. Or just fucking make a cover out that stick plastic (not as effective)
>It's less about money and more about operating on my own time constraints. Whenever my frames fail I have to get used to navigating the world without 20/20 vision which makes me feel like i'm disabled.
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