ABOUT OUR CUSTOM LENS TINTS
Steve Mower - Updated May 17th, 2022
Get a custom cosmetic tint or one of our innovative Mojo BluBlock Tints that filter UV and HEV blue light. Since 2012 we have been a leader in blue block tinted lenses. All of these lens tints are available as options in all lens types in all full-rim frames. (Rimless frames do not have BPI 500 or BPI 550 tint options.)
Mojo BluBlock Tints are designed to filter UV and HEV blue light, allowing beneficial blue light through, and to be comfortable to see through. There is a number called the Wertheim Factor that relates how effectively the lens tint balances HEV blue light filtration and beneficial blue light transmittance. The higher the Wertheim Factor (WF) the better the balance.
Mojo BluBlock Therapy Tints filter much higher levels of blue light. The Wertheim Factor is irrelevant with these tints as very little beneficial blue light is transmitted.
Mojo BluBlock Sun Tints are sunglass tints for outdoor UV and glare protection.
Cosmetic Tints aren't particularly effective at filtering blue light but are fun to wear in colors like blue and pink.
MOJO BLUBLOCK TINTS
For people that want lenses that reduce glare, we offer a unique line of lens tints filter HEV blue light and allow beneficial blue light through to your eyes. Beneficial blue light (from 455nm to 500nm) provides clearer vision and helps regulate circadian rhythm.
Mojo BluBlock Yellow Tint is a mild yellow color with a slight gold tinge. Yellow tints like this provide a sense of higher contrast and a bright feel. Yellow tints can help to alleviate issues related to Seasonal Affective Disorder (S.A.D.). Use: Day, Evening, Nighttime. Reading, Distance, Computer, Driving, Shooting. Okay for nighttime driving.
Filters: 100% UV, 89% HEV Blue Light, 66% All Blue Light, WF= 50
Mojo BluBlock Amber (Melanin) Tint is a mild, soothing amber color. Synthetic melanin is infused into the lenses providing great eye protection by filtering out most of the HEV light. It is designed to make up for the loss of retinal melanin which occurs with increasing age. Designed to address Advanced Macular Degeneration (AMD), and Computer Vision Syndrome (CVS). Our most popular tint. Use: Evening, Nighttime. Reading, Distance, Computer. Not for night time driving.
Filters: 100% UV, 87% HEV Blue Light, 67% All Blue Light, WF= 40
|Mojo BluBlock Tan (Melanin) Tint is a slightly more intense brown-orange color. Synthetic melanin is infused into the lenses providing great eye protection by filtering out most of the HEV light. It is designed to make up for the loss of retinal melanin which occurs with increasing age. Designed to address Advanced Macular Degeneration (AMD), and Computer Vision Syndrome (CVS). Our most popular tint. Use: Evening, Nighttime. Reading, Distance, Computer. Not for night time driving.
Filters: 100% UV, 91% HEV Blue Light, 79% All Blue Light, WF= 42
|Mojo BluBlock Brown 20 Tint is a 20% brown color. This is a comfortable tint to use indoors during the day to cut glare from overhead lights and from computer screens. Designed to address glare Computer Vision Syndrome (CVS). Use: Daytime, Afternoon, Reading, Distance, Computer. Not for night time driving.
Filters: 100% UV, 79% HEV Blue Light, 67% All Blue Light, WF= 34
|Mojo BluBlock Grey 20 Tint is a 20% neutral grey color. This is a comfortable tint to use indoors during the day to cut glare from overhead lights and from computer screens. Designed to address glare Computer Vision Syndrome (CVS). Use: Daytime, Afternoon, Reading, Distance, Computer. Not for night time driving.
Filters: 100% UV, 60% HEV Blue Light, 53% All Blue Light, WF= 29
MOJO BLUBLOCK THERAPY TINTS
These tints are more saturated and intense to see through. They filter more blue light (as well as beneficial blue light) than our regular Mojo BluBlock Tints. These are for people looking to address issues like insomnia, migraines, severe glare, CVS, AMD, and more. Details below...
|NEW! Mojo BluBlock Therapy Amber is a intense, yet comfortable amber color. This tint can help with insomnia issues. Wear them for reading or watching TV or computer screens 2 hours before going to sleep. Use: Evening, Nighttime, Reading, Distance, Computer. Not for night time driving.
Filters: 100% UV, 100% HEV Blue Light, 95% All Blue Light, WF= 22
Mojo BluBlock Therapy Orange is a intense orange color. This tint can help to mitigate or alleviate migraine headaches. Wear them for reading or watching TV or computer screens at night. Use: Daytime, Evening, Nighttime, Reading, Distance, Computer. Not for night time driving.
Filters: 100% UV, 97% HEV Blue Light, 86% All Blue Light, WF= 32
MOJO BLUBLOCK SUN TINTS
Our Mojo BluBlock Sun Tints are great for reading glasses outdoors or in plano or prescription distance powers. All darkly tinted lenses cut blue light glare. We use blue block dyes to achieve better levels of blue light filtration. 40 means a 40% tint. 60 means a 60% tint which is very similar to the standard depth of over the counter dark sunglasses.
Brown 40 and 60 are great for a higher contrast feel. For plano and distance Rx this tint works well for driving and cutting through haze.
Grey 40 and 60 are neutral in color and won't change the colors you see. Great for most sunglass situations.
NOTICE: BPI 500 AND BPI 550 TINTS HAVE BEEN DISCONTINUED.
We recommend either our Mojo BluBlock Therapy Amber or Orange tints. If you need lenses that filter 500nm to 600nm then take a look at the Somnilight Products.
COSMETIC LENS TINTS
Pink and blue tints provide a cool look while cutting some glare. The pink tints offer a bit of additional contrast while the blue tints dampen glare a bit. For everyday use the 15% versions are suggested.
The WERTHEIM FACTOR (WF)
Balance. We view our blue block offerings as a vision health aid. We are now using various tint colors in specific tint depths to provide a optimal blue light/beneficial light balance. This balance is calculated as a value called the Wertheim Factor. (Patent Pending - see the Patent Application here.)
From the Patent- "The Wertheim Factor is a calculation utilizing a computer algorithm to analyze the transmission spectrum of an ophthalmic lens or filter. It then takes a ratio of the total energy blocked by the filter in the spectral region under study to the total optical energy available in the spectral region under study. This ratio is then multiplied by the luminous transmittance of the filter. The algorithm then outputs this figure of merit, the Wertheim Factor, expressed as a percentage. The actual value will change depending on the wavelength range chosen so that when comparing lenses, they must all be evaluated over the same spectral range. In order to be meaningful, the spectral range must include the photopic region, centered on 550 nm, as well as the region of the spectrum considered to be harmful. In the preferred embodiment, the spectral range used is from 315 nm to 780 nm."
Simply put, we can read the transmission of light through a lens with a special UV/Blue Light spectrometer and see what types of light are being transmitted and what are being filtered. Black, or air has a Wertheim Factor of 00. A perfectly balanced lens filtering blue light/HEV and allowing beneficial light through, would have a Wertheim Factor of about 43 and is pretty rare.
|Wertheim Factor||Lens Tint Type||Blue/HEV and Beneficial Light Balance
|0.00||No lens or black||Black or Air N/A|
|10 to 20||Typical Non-blue block tint||Poor at filtering blue/HEV|
|21 to 29||Brown or Grey blue block tints||Good at filtering blue/HEV and glare outdoors|
|30 to 43||Medium to bright blue block tints||Very Good to Excellent at filtering blue/HEV and provide the best vision.|
|Over 43||Highly saturated tints||Therapy lens tints (see below*)|
Darker brown or grey blue block tints can result in more HEV/blue light being filtered, but also means that more beneficial light gets filtered out too, which will result in a lower Wertheim Factor. This is fine for sunglasses.
*Highly saturated yellow or orange lenses will result in a higher Wertheim Factor but will filter more blue/HEV than necessary and result in a very intense visual feel and look cosmetically unappealing. These tints can have benefits as "Therapy Tints".
Therapy Tints - For the vast majority of people there is no reason to block out beneficial light, blue or not. If you spend a lot of time sitting in front of a computer screen or using a tablet or cell phone, any of our blue block solutions, whether reading glasses or prescription will protect your eyes more than adequately. Therapy tints are typically a very intense yellow, orange, or red and are sometimes used by Eye Doctors to address various vision or health issues like color blindness, autism, retinitus pigmentosa, and many others. If for some reason you believe that blocking out all blue light/HEV or any beneficial light is something you need, then please consult with your eye doctor for advice.
The value of using the Wertheim Factor:
- It establishes a better standard of quality for blue block tinted lenses.
- Using a special UV/BLUE LIGHT spectrometer we can measure this value for all of our blue block tinted lenses and we can maintain and even improve quality over time.
- It provides a simple way to understand the overall quality of blue block tinted products for consumers.
ReadingGlassesEtc is one of the first companies to offer these innovative new vision health products using the Wertheim Factor as a quality standard. We have created Mojo BluBlock tints to provide optimal vision protection, the best optics, and the best value for computer users everywhere. Try them. You will love them. Send us feedback!
See Spectrograms and Light Transmission Details for our Mojo BluBlock Tinted Lenses
[A big thank-you to Dr. William Moore, research physicist (and co-inventor of the Wertheim Factor), for not only sharing and explaining his vast and highly technical expertise with me, but also for his very patient and friendly advice. -Steve Mower]
Steve Mower is a licensed dispensing Optician and creator of Mojo BluBlock Tints. Steve has over 30 years experience in the optical field. He has been a optical retail manager and has consulted on progressive lens development. Steve has been offering unique reading glasses solutions on-line since 2010. Steve is a member of Opticians Association of Virginia and Opticians Association of America.