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What is Light Therapy?

Light therapy (or phototherapy) involves exposure to specific wavelengths of light for a prescribed amount of time at a specific time of day.

Download Chapter 9 of the free eBook ‘Bright Light Therapy’


Light Therapy for SAD

Bright light therapy has been used to beat Seasonal Affective Disorder (SAD) for decades. According to Mayo Clinic, light therapy is the main form of treatment for Seasonal Affective Disorder.

Traditionally white light therapy has been used, however research has shown green light to be more effective (Oren et al, 1991).

How light therapy is used for Seasonal Affective Disorder

Seasonal Affective Disorder (SAD), commonly referred to as the winter blues, is low mood related to shorter days and reduced sunlight exposure during the winter months. Symptoms can include loss of energy, weight gain and difficulty concentrating.

When your eyes receive light, it sends a signal to your brain to control your daily rhythms through hormone production. Using light therapy has a positive effect on your mood and will leave you feeling more energized.

Portable light therapy for SAD

Portable glasses provide you the benefits of bright light with minimal interruption to your life so you can beat the winter blues.

Green-blue light therapy for winter blues

Re-Timer uses green-blue light, the most effective color of light for beating the winter blues.

Furthermore, our eyes have a lens that becomes cloudy and yellows as we age. This clouding restricts blue light entering the eye. Since most white light devices rely on blue wavelengths to beat Seasonal Affective Disorder, green light is considered to be a superior treatment option in older populations.

Read more about Re-Timer for Winter Blues.

Light Therapy for Sleep

Light therapy is a natural solution to change when you sleep and wake.

If you are unable to fall back to sleep after waking early in the morning (advanced sleep phase) or have difficulty falling asleep at the beginning of the night (delayed sleep phase) Re-Timer can help you change your sleep.

When your eyes detect bright light, your body responds by signalling your brain to be awake and alert. This process also helps your body to understand when it’s time to sleep. Re-Timer light therapy glasses use light to help you maintain a consistent sleep–wake rhythm.

How does light therapy change your sleep?

Our levels of melatonin, a hormone produced in our brain, vary over a 24-hour cycle and increase at night causing us to feel sleepy. Modern lifestyles and other factors, however, interfere with this natural cycle.

Light exposure regulates the body clock. The light suppresses the body’s production of melatonin, enabling us to change the time we feel tired and therefore change our sleep.

Morning bright light therapy

Adjust your body clock to an earlier schedule through repeated exposure to bright light appropriately timed in the morning.

Evening bright light therapy

The most effective way to re-time your body clock to a later time is by obtaining bright light visual stimulation in the evening.

Green-blue light therapy for insomnia

Green-blue light has been proven to be more effective at re-timing the body clock and suppressing the production of melatonin (Lack et al. 2004).

Re-Timer light therapy for sleep

Wearing Re-Timer for 30-45 minutes (morning or evening) will help you take control of your sleep, naturally.


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© Copyright 2020 Re-Time Pty Ltd. All Rights Reserved. Re-Timer™ is a registered trademark of Re-Time Pty Ltd. The views and information expressed here should be considered as general only, and should not be used for medical purposes.