This thread got me thinking eye protection. I did some Googling and found some interesting info.
Most of us who have been shooting for a while probably know that the basic standard for eye protection is ANSI Z87.1. This standard was recently updated in 2003, when ANSI introduced a distinct "high impact" test.
The tests for the basic impact protection is "drop ball". Any glasses bearing the Z87 mark must pass the following tests:
Quote:
Drop Ball--Shall be capable of resisting impact from a 25.4mm (1 in.) steel ball dropped from a height of 127mm (50 in.). The lens shall not fracture.
Penetration--Plastic lenses shall be capable of resisting penetration from a weighted projectile weighing 1.56 oz. dropped from a height of 50 in. The lens shall not fracture or be pierced through.
|
In addition, lenses bearing a Z87+ mark must pass the "high impact" test:
Quote:
|
17.6 oz. pointed projectile dropped from a height of 51.2 in. Should not cause any parts or fragments of the protector to be ejected that could contact the eye of the head form.
|
and the "high velocity" test:
Quote:
1/4 in. steel ball traveling at 150 ft/s (102mph)
No contact with the eye of the head form is allowed as a result of the impact.
No parts or fragments of the protector may be ejected that could contact the eye of the head form.
|
Note that prescription / non-prescription lenses are tested slightly differently (non-prescription lenses are tested while mounted to the glasses). More info
here.
I'm thinking that everyone using firearms probably wants AT LEAST the Z87.1+ 2003 protection. There is another standard,
MIL-PRF-31013, that defines a higher-velocity test:
Quote:
The ballistic resistance of the spectacles shall be such that they will
pass a Vo test using a 0.15 caliber, 5.8 grain, T37 shaped projectile at a velocity of 640 to 660 feet per second.
|
I'm not sure what a T37 shape is, but 0.15", 5 grain projectile is about the size and weight of a #2 shotgun pellet. I call this standard "Cheney protection".
So much for the specs, how about some glasses. I've been using the NRA's
Tactical glasses which sell for 29.95. They meet Z87+. My number one complaint about these is that they fog up badly. They form a seal around the eyes, which is great for preventing errant .22 casings from falling between the lens and my forehead. But the downside is they get sweaty quite quickly if it's warm. I have problems with my shooting stance as it is, but in the summer I've found myself adjusting my head position so that I can peer through the part of the lens that is not totally obscured by moisture.
Therefore, I'm looking for new glasses, and I'd appreciate any suggestions. What works for you guys?
Years ago I had a nice pair from a company called "protective optics", which is apparently now
Wiley X. They make a series of glasses that meet Z87+ and the Mil-spec. They are a fair bit pricier (around $100) but most models come with interchangeable lenses.