Sunglasses Company -- Our Shades SAVED Pro Volleyballer's Eyeball

Pro volleyball player Morgan Miller -- wife of Olympic skier Bode Miller -- would've lost her eye if not for the special sunglasses she was wearing ... when her husband whacked a golf ball into her face at 160 mph ... so says the sunglasses manufacturer.

Morgan tweeted about the accident soon after it happened yesterday -- posting the gnarly photo along with a brief explanation -- claiming she and Bode were out golfing (somewhere) and he nailed her right in the peeper ... HARD.

While she was holed up in the hospital, Morgan also thanked the sunglasses manufacturer -- a company called Kaenon -- for making the shades that saved her eye.

But a rep for Kaenon says the company's not surprised the glasses came in handy -- telling TMZ, "While accidents like this are rare, it was for this exact reason that we set out to create the SR-91 polarized lenses we did."

The SR-91 lenses are advertised as being the only "impact-resistant" sports performance sunglasses on the market.

Thanks to the shades, Morgan says she "only got 50+ stitches instead of losing my eye."

The Kaenon rep adds, "Our thoughts and best wishes for a full and speedy recovery go out to Morgan and can't wait to see her blocking shots at the net again real soon."