Rex Specs Replacement Lenses
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Rex Specs Replacement Lenses

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$29.95 $19.95
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RexSpecs Replacement Lenses


Dogs are rough on gear - there is just no way around it. Rex Specs are design to easily change out the lenses when the light conditions change or the lenses become too worn.

Note: Mirror lenses are the same darkness to look through as the smoke lens but have a mirror coating applied. This coating does scratch. We've made them as durable as possible - but if your dog goes after a squirrel in the rocks or bushes with their mirrored lenses - the lenses will show signs of the hunt! The UV protection is not compromised by scratches - use them until they're completely beat!

 All sizes available- these lenses are purchased via preorder - please email us at and we will assist you with a purchase. Please note there can be a lead time of 4-6 weeks as these come from the US.

  • Polycarbonate, UV 400 lens protect against 99-100% UVA/UVB sun rays
  • Rated ANSI Z87.1-2010 for impact resistence (size Large only) 
  • 5 tints available - Clear, Smoke, Silver Mirror, Red Mirror, & Blue Mirror
  • Replacement lenses are available individually or in packs of three

How to Change your FRAMES


Ultra violet light is known to cause various types of damage to the eye. Eye conditions in our personal dogs are why Rex Specs were born. One of our dogs had chronic sunburn to the eyelid and surrounding area due to lack of pigment, and one was diagnosed with Chronic Superficial Keratitis (pannus). This condition is a progressive change that occurs where blood vessels and scar tissue invade the cornea, and in severe cases can involve most or all of the corneal surface area resulting in blindness. Thus, having the lens be UV resistant is a must – and polycarbonate is the perfect material.

Polycarbonate has natural UV blocking properties – this allows our clear lenses to offer the same UV protection as the tinted lenses. Polycarbonate lenses are used for sunglasses, ski goggles, riot shields, and in many other applications. It’s a great material because it not only blocks 99.9% of UVA and UVB rays, but it’s also shatter resistant. Check out the video of our goggles passing the ANSI Z87.1–2010 impact resistance test (see above).

Another way to describe our lenses is by their Visible Light Transmission (VLT). This is a measurement of how much light the lens allows to pass through to the eye.

Rex Specs Lens VLT:

Clear - allows 92% of visual light to pass through

Smoke, and Red Mirror - allows 20% of light to pass through

Blue Mirror - allows 15% of visible light to pass through

Silver Mirror - allows 13% of light to pass through

So, our Silver Mirror lens is the darkest lens we offer.

Finally, dogs do not see the same way that humans do. They cannot focus very well on objects within 20” of their face. Also, their visual acuity is estimated to be around 20/60, whereas humans can see 20/20. Therefore, they may not notice the scratches in the lenses as easily as we do. This is why we tell our customers to use the lenses until they're totally beat up. Check out the photo below of  Tuckerman with his 'used' lenses.


1 Review

  • Rex Specs

    Posted by Lynda on 10th Nov 2019

    Happy customer, my dog tolerates her Rex Specs very well They are a life saver for my dog, in protecting her eyes from sun damage - a working border collie with no pigment on her lower lids.
    She is hard on these Specs however and I have made an extra strap to attach them to her collar, so as to prevent losing them if she gets them off (she did manage to do that in the introductory phase)
    She has worn them for a full summer and recently started to get the lens popped out - hence the purchase of replacement lens. I will have to fashion something that attaches them better. These slight modifications are only a minor inconvenience on a fantastic product, the best I've found. As said my dog tolerates them well but as she is running free when working in the farm has the ability to frequently roll around in the grass, and dirt particularly after swimming which of course she also does frequently on the hot sunny days she is wearing them.
    No complaints, super service and fast delivery, thanks

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Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

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Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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