Light therapy
Seasonal Affective Disorder (SAD)
10 mins

Light Therapy Visors for Seasonal Affective Disorder: Benefits & Research

Written by AYO Team

Alex is the World's First Circadian Health Wearable. Sleep Better, Boost Energy, Embrace Wellness!

Share article
Light Therapy Visors for Seasonal Affective Disorder: Benefits & Research
Table of contents

Key Takeaways

  • Light visors offer a portable alternative for treating seasonal affective disorder, delivering therapeutic light through a wearable device that can be used during morning activities.
  • Research shows mixed effectiveness and outcomes depending heavily on consistent daily use and proper device positioning.
  • While generally safe, light visors require an investment ($150-$400), and potential users might want to consult healthcare providers first, especially those with eye conditions or photosensitive medications. Also, you should note that FDA does not test, approve, or regulate SAD light-therapy devices.

For millions struggling with seasonal affective disorder, winter brings more than cold weather.

They bring overwhelming fatigue, persistent low mood, and a crushing lack of energy that can make even simple daily tasks feel impossible.

Finding a practical, convenient treatment that fits into daily life can be impossible.

Light visors have recently emerged as a potential solution, promising therapeutic light exposure through a wearable device you can use during your morning routine.

The answer isn’t straightforward, but science offers some clarity.

Recent research reveals crucial insights about light visors’ effectiveness, their impact on seasonal depression symptoms, and who might benefit most from them.

Without further ado, let’s jump right into the article.
Did you know?
Your brain is most sensitive to light in the early morning - that's why just 15 minutes of light exposure then can be more effective than an hour later in the day.

What Are Light Visors for Seasonal Affective Disorder?

Light visors are wearable devices designed to deliver therapeutic light exposure for seasonal affective disorder treatment.

They consist of a light source mounted on a visor or headband just above your eyes, creating a portable light delivery system mimicking aspects of natural daylight.

Most light visors emit light equivalent to 10,000 lux (a measure of light intensity). For comparison, a bright sunny day provides about 10,000-30,000 lux, while typical indoor lighting only delivers 50-200 lux.

For light therapy glasses, however many times irradiance can be used instead of lux measurement (illuminance) due to close proximity to the eye.

Additionally, you might note m-EDI instead of Lux measurement, which stands for Melanopic Equivalent Daylight Illuminance, explaining how much a light source affects the non-visual system of humans, including our circadian rhythm.

Lower levels of m-EDI (e.g. above 1000 m-EDI lux) and irradiance levels can be considered as effective as traditional light therapy boxes of 10.000 lux.

The therapeutic light from visors is specifically designed to be bright enough to influence brain chemistry while remaining safe for the eyes.

The design allows light to enter your eyes from above, similar to how natural sunlight would reach you when outdoors.

This positioning is intentional – light receptors in the lower part of your retina are susceptible to the type of light exposure that may help regulate mood and circadian rhythms.

The Science Behind Light Visors

Light visors deliver therapeutic light through specially designed bulbs positioned above your eyes.

When you wear the device, it emits bright light downward into your eyes at a specific angle, allowing you to receive light therapy while keeping your hands free and maintaining peripheral vision.

The key aspects of light visors include:
  • Light Intensity: Most therapeutic light visors deliver between 500 to 2500 m-EDI lux of light. Your doctor might recommend different intensity levels based on your symptoms and sensitivity.

  • Treatment Duration: Sessions typically last 20-30 minutes, with lower-intensity lights requiring longer exposure. For instance, a 1500 m-EDIlux visor might need 20 minutes, while a 500 m-EDIlux device might require more.

  • Optimal Timing: Most medical professionals recommend using light visors in the early morning, ideally within an hour of waking. This timing helps regulate your body’s natural wake-sleep cycle.

The device should be positioned so that the light shines down into your eyes at about a 30-45-degree angle, though you shouldn’t look directly at the light source.

Most devices have adjustable settings for intensity and timer functions, allowing you to customize your treatment based on your doctor’s recommendations and personal comfort level.


Did you know?
Keep your light visor by your coffee maker or breakfast spot—this will naturally remind you to use it during your morning routine.

The Connection Between Circadian Rhythms, Light, and SAD

Understanding how light visors work starts with recognizing the crucial relationship between light exposure and your body’s internal clock.

Your circadian rhythm—your body’s natural 24-hour cycle—relies heavily on light signals to regulate essential functions, including mood, sleep, and energy levels.

During darker winter months, this natural system can become disrupted, leading to significant changes in two essential brain chemicals:
  • Serotonin: This “feel-good” neurotransmitter typically decreases during winter due to reduced natural light exposure. Research shows that people with seasonal affective disorder often have lower serotonin levels, contributing to depressive symptoms.

  • Melatonin: Your body’s sleep hormone typically increases in darkness. During winter’s shorter days, people with seasonal affective disorder may produce too much melatonin, leading to daytime fatigue and low energy.

The timing of light exposure is particularly crucial.

Your brain is most sensitive to light signals in the early morning, which explains why symptoms often worsen upon waking.

This morning sensitivity also explains why light therapy, including light visors, is typically recommended for use within the first hour after waking.

The relationship between light and these brain chemicals isn’t just theory—it’s backed by research showing that proper light exposure can help normalize serotonin and melatonin levels, potentially improving mood and energy levels in people with seasonal affective disorder and supporting their circadian rhythm.

Effectiveness of Light Visors for SAD

Research on light visors shows mixed results for treating seasonal affective disorder.

While some studies demonstrate positive outcomes, others find minimal benefit.

Success rates vary significantly among users, with effectiveness depending on several factors:

  • Consistent daily usage during darker months.
  • Correct positioning of the device.
  • Appropriate light intensity and duration.
  • Individual sensitivity to light therapy.
  • Timing of treatment sessions.

This variation might be due to differences in individual circadian sensitivity, severity of symptoms, or adherence to the recommended treatment protocol.

Current medical guidelines suggest considering light visors as one of several recommended treatment options due to their ease of use, minimal to no side effects, and nature as a natural solution (drug-free option).

Advantages, Disadvantages, and Safety Considerations

Before investing in a light visor, it’s essential to understand what these devices can and cannot offer.

Here’s a practical breakdown of their main benefits and limitations.

  1. Portability and Convenience: You can use light visors while doing other activities like preparing breakfast, reading, or working at your desk.
  2. Consistent Light Delivery: The fixed position on your head helps maintain a steady angle of light exposure, potentially providing more consistent treatment than a lightbox.
  3. Time-Efficient: The ability to multitask during treatment makes it easier to incorporate into busy morning routines.
  4. Privacy: They are less conspicuous than larger light therapy devices, making them suitable for shared living spaces or office environments.
  5. Potential fix to SAD and other issues: Light visors have been shown to help with most SAD symptoms like fatigue, low mood, and lack of energy.

Disadvantages

  1. Cost vs. Effectiveness: With prices ranging from $150 to $400, the investment might be substantial, considering the mixed research on effectiveness.
  2. Battery Life: Most models require regular recharging, which can interrupt treatment if you forget to charge the device.
  3. Comfort Issues: Some users report discomfort from wearing the device, including headaches or eye strain, particularly during initial use.
  4. Limited Research: Fewer studies validate their long-term effectiveness compared to other light therapy options like light boxes, however, this is starting to change with light therapy glasses becoming a go-to solution for SAD and other light therapy treatments

Common Side Effects and Safety Considerations

Most side effects are mild and typically resolve within a few days:

  • Eyestrain or visual fatigue.
  • Mild headaches.
  • Nausea.
  • Feeling “wired” or jittery.
However, it’s important to always follow these essential safety precautions:
  • Start with shorter sessions (e.g., 20 minutes.)
  • Use lower-intensity settings initially.
  • Don’t look directly at the light source.
  • Maintain proper positioning above the eyes.
  • Keep a consistent treatment schedule.

Did you know?
Scientists found that the lower part of your retina is especially sensitive to light that regulates mood - that's why light visors are designed to shine downward into your eyes.

How to Buy the Right Light Visor for You

There are a lot of light visors and light devices out there.

Which one is the best for you?

Which one should you try first?

While the answers to those questions depend on your specific needs, here are a few important considerations when buying a new pair of light visors.

Essential Features

  • Light Intensity: Choose a device that can deliver at least 500-1,500 m-EDI lux. Ensure the manufacturer provides verified light measurements like AYO’s blue light therapy glasses at the recommended usage distance.

  • Light Type: Look for devices using specialized LED technology enriched in blue light rather than other light options. Specialized light therapy LED lights are more energy-efficient, are longer-lasting, and typically provide consistent light output.

Quality Indicators

  • Published research supporting the specific model or at least backed by experts in the area.
  • The manufacturer’s warranty is at least 1 year.
  • Precise specification of actual light output and properties.
  • Professional customer support.

Warning Signs to Watch For

  • Unclear or unspecified light output measurements and light properties.
  • There is no return policy.
  • Lack of safety certifications.
  • Unrealistic claims about effectiveness.

Light Visors: A Possible Cure for SAD

Light visors offer a portable option for treating seasonal affective disorder, though their effectiveness varies among individuals.

While research shows mixed results, meaning they are not a one-size-fits-all solution, they are worth considering if convenience and comfort are priorities.

Found this article helpful? Check out our other blogs here.

Master your Circadian Health with The World's First Circadian Health Wearable

AYO is an award-winning health & wellness wearable. Made for doers, dreamers and those who live life to the full.

BUY AYO