Customer service non existent Customer service non existent. Unreachable when the return of the product was requested. Have sent 5 emails and phoned several times without an acknowledgement of the emails and just get voicemail on the phones. Have emailed both their UK and US "support" addresses.

Purchased the glasses and didn't feel… Purchased the glasses and didn't feel they made enought difference to justify the cost. Got a return label after only two emails (!) Returned and have DPD confirmation of delivery. No refund. Six emails and three calls (unanswered) later, still no refund. Now have to go through the hassle of making a claim via my credit card provider. Do not trust them!

$400 glasses not delivered bad customer support! I bought a pair of colour blind correcting glasses which did not get delivered. When I raised this with their customer service team they informed me that UPS had contacted me for additional payment and I told UPS that I wanted my $400 glasses destroyed. I have asked for more details and their customer service team have not answered any of my emails.

Before you think about buying these… Before you think about buying these glasses, watch the videos on them as being a scam on youtube, they prove beyond a doubt that it is a scam! If you buy these you will be throwing your money away.

Good but not as "wow" as thee videos show Strong Protan. Bought sunglasses. There is some improvement to the vision of reds. Although with some drawbacks: they kind of tint the rest of the colors. They only seem to work on reflected lights (on emitted lights, like the one of a screen doesn't seem to work). They must be used in open sun to see some effect. At the moment it's the best available option if you want to improve your color vision.