Fit through the night

thanks to the proven effective

Propeaq night shift glasses

Learn how to get fit through your night shift in the video below.

If they benefit, why not you?

“Besides the fact that the night shift glasses keep me awake and alert, I also find it very easy that their app tells me when I have to wear the glasses for 30 minutes. Ideal!"


Jeroen Bosch Ziekenhuis

"I like having night shift glasses like that, which wake me up when I'm called up."


Veiligeheidsregio NHN

“The Propeaq night shift goggles ensure that I get through the night as well and healthily as possible.”


ambulatory IC nurse

“I can handle night shifts quite well, because I always sleep well and stay awake at night easily. The main advantage of the light glasses for me during my night shift is that I have less need for unhealthy food, coffee and energy drinks. ”:


IC, Elisabeth Twee-Steden Hospital

Why does that blue light actually work? And do I have to work all night with those night shift goggles on?

Anyone who does night work and therefore works irregular shifts knows the dip: the moment when sleep threatens to strike, while you are still working. Our internal clock produces that sleepy feeling under the influence of the day and night cycle. Daylight wakes and keeps us awake, when night falls the body prepares for sleep. When the outside temperature is lowest, human energy also reaches the lowest point. That is the moment of deep sleep. This is how our biological clock has been programmed since prehistoric times. Still, staying alert and energetic during night work is possible with Propeaq night shift goggles. You do not have to use it all working hours: Wearing for 30 minutes with the blue light switched on is sufficient to stay ahead of the dip. It works like this: the blue light looks like an extra sunrise to your senses. Your body responds by temporarily stopping the production of the sleep hormone melatonin. You can then perform at level for a few hours, as long as you have used the blue light before you feel the dip.

"Gebruik de nachtdienstbril volgens de voorgeschreven methode en je merkt het verschil. De ene keer wel de nachtdienstbril en de andere keer niet, heeft geen nut."

En hoe werken die oranje glazen dan?

Kom je na de nachtdienst moe van het werk thuis, dan kan je lichaam opnieuw een energie-impuls krijgen, doordat de dag aanbreekt en de zon opgaat. Dat is natuurlijk niet de bedoeling. Daarom heeft de nachtdienstbril van Propeaq nog een functie: verwissel de lichtblauwe glazen voor de meegeleverde oranje glazen als je thuis bent. Houd ze 30 minuten, een half uurtje, op terwijl je tot rust komt in je eigen omgeving. De rode glazen blokkeren al het natuurlijke en kunstmatige blauwe licht uit je omgeving, stimuleren de aanmaak van melatonine en zorgen daarmee voor de gewenste slaperigheid.

Hoe weet ik wanneer ik wat moet doen?

De nachtdienstbril van Propeaq ondersteunt de energie, stemming en gezondheid van iedereen die in onregelmatige diensten werkt. De gratis Propeaq TimeTooler app creëert de juiste persoonlijke gebruiksmomenten voor ochtend-, tussen-, avond- en nachtdiensten. Bij opeenvolgende nachtdiensten verschuift het moment om blauw licht in te zetten. Een strak en persoonlijk schema helpt bij de overgang van opvolgende nachtdiensten naar een normaal dagritme.

Download our free white paper "Working healthily at night"

The free whitepaper contains a lot of information about which measures you can take to make the night shift healthier and less stressful.

The following experts, among others, have contributed to the development of this white paper:

Prof.dr. Bert van der Horst – Chronobiologist

Sonja Smits – Occupational expert, night work expert

Elly Kaldenberg – Nutritionist, focused on night shift

Toine Schoutens – Expert healthy light and Chrono coach

Kasper Jansen – Sports doctor, recovery specialist, author De Powernapparadox

Fill in your contact details and press send. You will receive an email with the download link for the whitepaper.

Chrono Eyewear BV uses the information you provide on this form for news updates about Propeaq’s field and products. You can change your mind at any time by clicking the unsubscribe link in the footer of any email you receive from us, or by contacting us at [email protected] .

"I didn't benefit much from it myself, but my colleagues definitely noticed a difference"

Asphalt crew

Heijmans Infrastructure

"I can not live without"


PACU, Erasmus MC

"we sleep better and we suffer less from that dip, nice thing those glasses"

Amber & Veronique

ER, Antonius Hospital

"blue with blue, ideal glasses. Keep me sharp during the rough hours in the middle of the night"


Law enforcement

Surely you also want to make your night shift a lot more bearable?

Yes please, send me more information here
or click on the button below to immediately schedule a no-obligation appointment

More than 1,000 people who work night shifts at the following organizations suffer less from the dip and sleep better.

The Propeaq night shift glasses are regularly in the media

(click on the article for full story)

Download the free My Propeaq TimeTooler App

Optimal effect of Propeaq night shift goggles requires planning. To maximize the effect of our light glasses and different lenses, we have developed a special app for specific applications. World travelers can combat or prevent jet lag with the app. Night workers receive a personalized schedule via the app for optimal adjustments to the various night shifts and rosters. Search Google Play or App Store for My Propeaq TimeTooler. This is free to use, even if you do not have Propeaq light glasses in your possession. Scan the QR codes below for an instant download.

Below some screenshots of the Propeaq TimeTooler app with 4 night shifts

The table below illustrates how Propeaq night shift goggles can be used during different night shifts.



30 minuten blauw licht

bij chrono type: vroeg

Oranje glazen

1 nachtdienst

Begin dienst om 23:00 uur

Einde dienst om 07:00 uur

Tussen 00:00 uur en 02:00 uur

Bij thuiskomst

30 minuten voordat je naar bed gaat

2 nachtdiensten aan éénsluitend

Begin dienst om 23:00 uur

Einde dienst om 07:00 uur

Tussen 01:00 uur en 03:00 uur

Bij thuiskomst

30 minuten voordat je naar bed gaat

3 nachtdiensten aan éénsluitend

Begin dienst om 23:00 uur

Einde dienst om 07:00 uur

Tussen 02:00 uur en 04:00 uur

Bij thuiskomst

30 minuten voordat je naar bed gaat

Avond dienst

Begin dienst om 15:00 uur

Einde dienst om 23:00 uur

Tussen 19:00 uur en 21:00 uur

Bij thuiskomst

30 minuten voordat je naar bed gaat

Ochtend dienst

Begin dienst om 07:00 uur

Einde dienst om 15:00 uur

Direct na opstaan en eventueel

tussen 13:00 uur en 15:00 uur

30 minuten voordat je naar bed gaat

Note: Do not go to sleep immediately after the last night shift, but only for a few hours between 10:30 and 14:00, followed by 30 minutes of light. Instead of 30 minutes, you can also use blue light for 2×15 min. 3 or 4x 15 min is also allowed. Only use blue light in combination with the light blue lenses.

Did you have a short night or do you need a power nap in the afternoon? The light glasses are also a suitable aid to maintain energy and mood. Remember blue light to stay awake and orange glasses to help you fall asleep. The gratus Propeaq TimeTooler app indicates exactly when it is time to wear the glasses and which glasses are needed.

How exactly does light work on our biorhythm

NTR Focus (NPO) - Broken through the night

Science journalist Diederik Jekel in conversation with Roelof Hut (Chronobiolog of the UMCG and visiting the Jeroen Bosch Hospital where Propeaq light glasses are discussed with Astrid Salet (Intensivist) and Jo van Bussel (Head of Intensive Care)


Propeaq’s blue light has a wavelength of 468 nanometers at an intensity of only 35 lux. The LEDs are just over half an inch (1.5cm) from the eyes and are harmless* for normal use. The LEDs are located 1.5 cm from the eye and are harmless in normal use *. 1 x 30 minutes of blue light per 24 hours is often sufficient. The light glasses do not have to be worn continuously for a long time. For those who already wear glasses, there are solutions with nose clip glasses from Nooz optics or even prescription lenses. Due to a close collaboration with a renowned internationally operating manufacturer of spectacle lenses, Propeaq spectacles are also available in prescription form from your own optician.

* In case of diseases of the retina, for example macular degeneration, we recommend using the light glasses. Insufficient research has been done into possible damage in these situations.

Integrated approach to night shift problems

The Intensive Care Unit (IC) of the Jeroen Bosch Hospital (JBZ) completed the ‘Fit through the night’ project at the end of 2018. The insights have now been translated into policy at the department. The JHA project is explained in a shortened version of the NTR broadcast “Nachtwerk”. The integrated approach to reduce the adverse health consequences of night shifts appears to be a step in the right direction. Employees feel fitter than before the introduction of the new policy. A policy that rests on four core pillars: light therapy, healthy nutrition, power nap and roasting.

The promising results were published in the summer of 2020:


In addition to shifting the biological clock with light therapy, a power nap is a very effective way to get new energy. Many hospitals, including the Jeroen Bosch Hospital, Zuyderland Hospital and VU Amsterdam, use two options for this; a powernap pod that wraps itself around the user and with soothing music or a massage chair that provides a ‘zen moment’. A power nap always lasts a maximum of 20 minutes, no longer. You will then remain in the sleep phase. During this phase, the sleep-pressure hormone adenosine decreases considerably. Once awake from the power nap you feel reborn. If you sleep longer than 20 minutes, you will quickly enter the very deep sleep phase. Waking up in the very deep sleep phase is disastrous, you feel broke and ‘groggy’. Lying down for longer is tempting, but certainly not desirable. If it does happen, complete a full 90-minute sleep cycle so that you wake up in the REM sleep phase.

Collaboration with BOOZTR

As a market leader, it makes a positive contribution to well-being by deploying innovative rest and recovery solutions. The carefully chosen products guarantee an effective recovery in 20 minutes.

Thanks to its extensive portfolio, BOOZTR offers a one-stop-shop experience. From powernap pods to massage chairs, from toolkits to consultancy. Simply everything under one roof. Products and services that are closely coordinated are bundled into one powerful intervention.

BOOZTR’s customers are active in the healthcare sector, education, industry, sports and shared workspace. For example, BOOZTR can count Nationale Nederlanden, Leiden University Medical Center, VU Amsterdam, Abbott and Feyenoord among its clientele. Visit or call 0800-POWERNAP (0800-76937627).

Healthy food

Night shift employees tend to eat the wrong thing. The human metabolism is different at night than during the day. The kitchen prepares special meals for the night workers. These contain protein-rich, low-carbohydrate food with the correct fats. Think of vegetables, fruits and nuts, combined with fish if necessary. Employees experience less stomach pain or intestinal complaints. The long-term effect is mainly less chance of weight gain.

App 'Good night'

Being fit during the night shift is important for the quality of care and the health and sustainable employability of employees. To help staff stay healthy and fit during night shifts, StAZ has developed the app ‘Goedenacht’ together with SoFoKleS (the Social Fund for the Knowledge Sector). This free app is full of practical information and tips for staying vital and healthy during the night shift in a hospital. The app contains useful tips, facts and tools. The ‘Survival kit’ contains recipes from a dietitian that you can rate with stars. In ‘Test yourself’ you will find facts and fables about working at night and with the pedometer you can discover whether you are moving enough. The app is suitable for the operating systems iOS and Android and can be downloaded for free in the Apple App Store and on Google Play .

Flexible roasting

Nurses can largely create their own schedule. The result of flexible scheduling is that responsible planning is achieved more quickly and that employees are more satisfied than before.

Surely you also want to make your night shift a lot more bearable?

Yes please, send me more information here
or click on the button below to immediately schedule a no-obligation appointment
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Download ons gratis whitepaper "Gezond werken in de nacht"