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Letto - Blueblocker Glasses
Letto - Blueblocker Glasses
Letto - Blueblocker Glasses
Letto - Blueblocker Glasses
Letto - Blueblocker Glasses
Letto - Blueblocker Glasses
Letto - Blueblocker Glasses
Letto - Blueblocker Glasses
Letto - Blueblocker Glasses
Letto - Blueblocker Glasses
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  • Load the image in the gallery viewer, Letto - Blueblocker Glasses
  • Load the image in the gallery viewer, Letto - Blueblocker Glasses
  • Load the image in the gallery viewer, Letto - Blueblocker Glasses
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Letto - Blueblocker Glasses

Blueblocker Glasses
Normal price
79,00 €
Special price
79,00 €
Normal price
Sold out
Unit price
per
incl. VAT plus Shipping costs
  • Ultra light frame
  • Double anti-reflective & tempered lenses
  • 100% blue light protection
Delivery time approx. 2 to 4 working days

Free shipping
with DHL within Germany

Order risk-free
30 days right of return

Buy both glasses and save money! Click here for the Letto Bundle.

Lichtblock® Letto Blueblocker Glasses

Model
most popular
Protection until
500 nm 550 nm
Graph
Block
Blue light Blue light + parts of the green light spectrum
UV 400 filter
100% 100%
Colour fidelity
■■■■□ ■■□□□
Screen work
■■■■■ ■■■□□
Series / film experience
■■■■□ ■■□□□
Going out in the evening
■■■■■ ■■■□□
Sleep (protection from melatonin suppression)
■■■■□ ■■■■■
Stress reduction for the eye (protection of sensitive photoreceptors)
■■■■■ ■■■■■
Suitable for road traffic
no no

Our lenses block 100% blue light

Glass

Transparent
Blue light filter

Lichtblock®
Blueblocker
100% blue light filter performance

max. 30%

100%
Sleep (protection from melatonin suppression)
Stress reduction for the eye (protection of sensitive photoreceptors)
  • Do you spend a lot of time in bright surroundings in the evening?
  • Are you often busy with screen work?
  • Do you like to watch a film or a series in the evening?
  • Do you have problems falling asleep or staying asleep?

Then the use of blueblockers may make sense for you.

The crucial and biggest problem with blue light after sunset is its effect on our nervous system. After dark, the light fools your brain into thinking it's the wrong time of day. This interrupts your sleep cycle and can have a negative effect on your health, especially over a long period of time. Yellow or orange lenses that block 100% blue light can help you protect your sleep cycle and improve your sleep quality.

Difference between LEDs and fire

Lichtblock Blueblocker Graphic LED Spectrum Bluepeak

LED spectrum

We speak of blue light at a wavelength of approx. 380 to 495 nanometres (nm). It is short-wave and very energy-rich light. Modern displays, LEDs and energy-saving lamps have a disproportionately high share of blue light. This stimulates certain photoreceptor cells and can lead to a dysregulation of your sleep-wake rhythm. This can have a negative effect on your hormones and metabolism. (1)


Fire (candlelight)

Before we were able to turn night into day through the invention of electricity, there were only natural sources of light in the form of fire. The big and decisive difference to today's light sources is the distribution of the light spectrum. Blue and green are hardly present in candlelight, as can be seen in the graph. Furthermore, fire has no flicker effect, which can stress your nervous system. Therefore, fire usually has a calming effect.


Lichtblock Blueblocker Graphic Spectrum Fire Candlelight
Tip - Reduce the light intensity in your surroundings in the evening and create a relaxed atmosphere with alternative light sources such as our Lichtblock® Uno and candlelight.

A systematic review by Hester et al. (2) comes to the following conclusion:

Out of the 24 publications focusing on sleep, there was substantial evidence for blue-blocking glasses being a successful intervention for reducing sleep onset latency in patients with sleep disorders, jet lag, or variable shift work schedules. Given the well-established biological mechanism and clinical research showing that blue-blocking glasses are effective for inducing sleep, they are a viable intervention to recommend to patients with insomnia or a delayed sleep phase.
  • Our 500 models protect your eyes 100% from blue light and are very comfortable to wear, especially if you still want to see "colours" in the evening.
  • Our 550 models protect your eyes 100% from blue light and they still reach into the green spectrum. This can help to accelerate the formation of melatonin.
  1. ncbi.nlm.nih.gov/pmc/articles/PMC4763136/
  2. pubmed.ncbi.nlm.nih.gov/34030534/
Manufacturer Lichtblock GmbH
Model LB-LETTO
Glass variants Light orange (500), dark orange (550)
Scope of delivery Blueblocker glasses, glasses case, glasses cleaning cloth

Spectacle dimensions

Spectacle width: 136 mm
Glass height: 46 mm Glass width: 52 mm
Bar width: 18 mm
Temple length: 130 mm

Properties

Frame colour Black
Spectacle shape Round
Frame type Full rim
Frame material Acetate
Weight 18 g
Accessories Spectacle case, spectacle cleaning cloth

Do you have any questions?

Maybe our FAQ page will help you. If not, please send us an e-mail to support@lichtblock.shop.

Customer Reviews

Based on 57 reviews
98%
(56)
0%
(0)
2%
(1)
0%
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0%
(0)
s
silke lutz
everything is fine

all best

T
Tatjana

I am very happy with the glasses, the frame is light, flexible. The glasses fit perfectly and does not press anywhere. Have it on in the evening. Got used to the glasses very quickly and can absolutely recommend them.

S
Susanne D.
The circadian rhythm- Lichtblock helps to

To stay healthy, the body needs not only enough sunlight, but also enough darkness. And to protect my 24-hour rhythm, I need these glasses when I surf/zoom/TV in the evening. Thanks. Attractive and functional product in one.

J
J.
Very satisfied!

Glasses block the light as it has been described. Wear it in the evening and have made a positive experience with it. Bin jdn the late hour still likes to watch his series or is on the phone and usually fall asleep quite late or I do not get tired so quickly.
Since I wear the glasses, it offers me good protection for the eyes, I sleep more quietly and also get tired faster. Fulfills its purpose :)

J
Jan D.
Effective blue filter goggles from Lichtblock: Improved sleep and eye protection

My experience with the blue filter goggles from Lichtblock has been entirely positive. The glasses have proven to be extremely effective. They helped me fall asleep more easily in the evening after watching TV. Even on long days at the office, I stayed more alert in front of the screen. A big plus is the fact that they not only filter blue light from devices like smartphones and PCs, but also LED lighting from lamps in the area. The entire ordering and shipping process was faster than expected, which is definitely a plus. I really liked the modern and sleek design of the glasses. The included glasses case and microfiber cloth are handy extras. By signing up for the newsletter, I was able to save an additional 10% off the purchase price. One minor drawback is that the frame of the glasses could possibly be sturdier. All in all, the blue filter glasses from Lichtblock exceeded my expectations. Not only does it provide effective protection for the eyes, but it also improves sleep. If the frame was a little more stable, it would be near perfect. I am very happy with my purchase and can recommend them to anyone who works in front of screens or wants to improve their general well-being.