You might have seen images on Hull FC’s social media account of players wearing glasses over pre-season.
Marc Sneyd and Connor Wynne were pictured wearing them, but what are they are what do they do? Hull Live gave them a whirl.
The glasses, made by American sensory company Senaptec, look completely innocuous at first glance, like a pair of heavily tinted sunglasses.
But turn them on and your vision quickly becomes distorted, using a strobe to block your vision for a split second, and therefore significantly disrupting your perception.
As such, when something is thrown in your direction such as a rugby league ball, confusion sets in as your brain attempts to trace the balls trajectory through the air, which, of course, makes it harder to catch.
The theory is that it strengthens the communication between the eyes and the brain, and thus improving hand-eye co-ordination, which the Black and Whites obviously see as a benefit ahead of the new Super League season.
A description of the glasses on the company’s website reads: “The Senaptec Strobe is designed to train the connections between an individual's eyes, brain, and body.
“Using liquid crystal technology, the lenses flicker between clear and opaque, removing visual information and forcing the individual to process more efficiently.
“The Senaptec Strobe can be integrated into existing training drills and exercises.”
The Black and Whites have two pairs of the glasses and will continue to use them through-out pre-season as they enter their third week of training.
A pair of these glasses aren’t cheap, though. They will set you back approximately £270, but for FC you can’t put a price on success.
Hull Live has launched a dedicated WhatsApp news service to keep you up to date with the very latest from Hull FC.
If you're on your mobile phone right now, CLICK HERE to sign up for free and make sure you follow the instructions.
If this link doesn't work or you're not on your phone, click here to find out how to sign up manually, and for more info about the service. Your number won't be shared with anyone else in the group.
Click here for more sports news
Follow Hull Live
Our daily newsletter - To get the latest headlines direct to your email inbox every day, click here .
Download our app - You can download our free app for iPhone and iPad from Apple's App Store , or get the Android version from Google Play .
Follow us on Instagram - On the Hull Live Instagram page we share gorgeous pictures of our stunning city - and if you tag us in your posts, we could repost your picture on our page! We also put the latest news in our Instagram Stories. Click here to follow Hull Live on Instagram .