Frequently Asked Questions

Our safety eyewear has adjustable side components so that they can fit most any size face or head. Since they magnetically attach to the earmuffs, the tendency to slide down your nose is eliminated. You will be able to wear your eye ear protection for long periods of time without the need to keep adjusting or pushing up your eyewear.

Although our current products fit 99% of the adult population, please note that some children, and users with small heads, may find that our eyewear is too large for them. (We are in development of additional models of eyewear that will fit the smallest of faces.) If you find that our products do not work for you, then you may simply return them within 60 days and we will gladly issue you a full refund. Please do not hesitate to contact us with any questions.

Magna Lens offers an optional snap-in prescription frame (Rx to be added by an optometrist or can be provided by us with a prescription - simply use our contact form to contact us for details). This prescription frame insert is easily installed on the inside of your Magna Lens one-piece wrap-around lens. Please visit our "Instructions" page for a video demonstration.

Our Magna Lens eyewear can be used with just about any brand of earmuffs. We offer our own earmuffs with built-in neodymium magnets to work with the Magna Lens eyewear system. Our passive earmuffs are configurable from a full configuration to a slim configuration, and our electronic earmuffs come in either a full or slim configuration.

The Noise Reduction Rating (NRR) of the full size electronic and passive earmuffs in their full configuration is 25. Our slim size electronic earmuffs have a NRR of 21. These ratings are uniquely maintained with Magna Lens eyewear that does not disrupt the seal of the earmuff pads, preserving between 2 and 17 dB of sound attenuation compared to traditional eyewear.

Yes! Magna Lens offers magnetic adapter kits so that you can add magnetic attachment points to your existing earmuffs, which will allow you to use the Magna Lens eyewear. This adapter kit is compatible with various models of popular earmuffs. If you are unsure as to what option is best for you, or do not see an adapter for your brand of earmuffs, then please feel free to contact us. We may have a solution for you that is not listed on our website as we are continually in development of numerous adapters.

Yes and No.  While many earmuff models offer similar noise reduction ratings (without eyewear), the Magna Lens design eliminates the gap in the earmuff cushion caused by eyewear. This gap can reduce your earmuff noise reduction rating anywhere from 2 to 17 dB depending on eyewear design. This means that your 25 NRR earmuffs may be performing as low as 8 NRR with traditional eyewear.

Here are some approximate noise ratings for various
firearms (indoor range tests):

.22LR pistol 154-158 dB

.45 auto pistol 158-163 dB

.40 S&W pistol 158-161 dB

9mm pistol 160-163 dB

.357 handgun 167-172 dB

12ga shotgun 158-160 dB

.556 rifle 165-167 dB

The National Institute of Occupational Safety and Health (NIOSH) has a formula for calculating safe levels of noise exposure as related to high level noise impulses such as firearm discharges. Below are some of the acceptable exposures based upon this formula.

One 140 dB (decibel) noise impulse in a 24 hour period

Ten 130 dB (decibel) noise impulses in a 24 hour period

Thirty-two 125 dB (decibel) noise impulses in a 24 hour period

One hundred 120 dB (decibel) noise impulses in a 24 hour period

Three hundred and sixteen 115 dB (decibel) noise impulses in a 24 hour period

One thousand 110 dB (decibel) noise impulses in a 24 hour period

You want to keep your noise impulse exposure within the recommended levels shown above.  If you are using a standard set of earmuffs that have a 25 dB noise reduction rating, then you would subtract the NRR rating from the level of the noise impulses you are being exposed to. A .22LR pistol at an indoor range will generate an impulse of approximately 155 dB.  So when you subtract the 25 dB rating from the 155 dB noise impulse you will be exposing yourself to 130 dB.  According to NIOSH you will exceed your limit after ten rounds fired.

The Magna Lens system will help preserve the noise attenuation of your earmuffs compared to traditional eyewear with an over-the-ear frame design, however even with the Magna Lens system, it is important to remember that all earmuffs have their protective limits. As you see above, the risk increases with repeated sound exposures.

One smart safety option is to wear in-the-ear plugs along with over-the-ear earmuffs. If you add soft expandable earplugs, in addition to your earmuffs, you will add approximately 18-20 dB of additional protection on top of your earmuff rating. This will greatly extend your shooting time.

An excellent instructional video on fitting foam earplugs can be found here.