Are Light Therapy Glasses Right for Me?

By Brandon Peters, MD

They look a little futuristic, casting a blue light over the eyes and onto the face. In some ways, they are. Light therapy delivered via glasses also relies on science that is as old as time. The use of light therapy glasses may be helpful to manage circadian mood and sleep disorders like seasonal affective disorder (SAD), insomnia, and jet lag. They may offer a boost of energy on a winter morning. How do light glasses work and are they right for you? Learn about phototherapy, circadian rhythms, and the usefulness of artificial light delivered via glasses for several conditions.

What is Light Therapy?

Light therapy, or phototherapy, is the use of light to treat a medical condition. It may be helpful to treat problems that occur when the internal circadian rhythm is misaligned to the natural patterns of light and darkness. This may impact the ability to sleep, the release of hormones including melatonin, and even mood and energy levels.

Light therapy may be done by properly timed exposure to sunlight. Unfortunately, living at northern latitudes may make this more difficult in the winter months. In some cases, an artificial source of light may be needed.

There are certain medical conditions that respond extremely well to this treatment, but how is it delivered?

Light Boxes Versus Light Glasses

Historically, light boxes were used to artificially deliver phototherapy. Initially quite large, the technology has become more portable. In fact, there are now several brands of light glasses that are capable of performing the task:

Ayo

The smallest glasses are available for $299 from Ayo. With a well-integrated app, it is possible to personalize the program by providing information on sleep habits and lifestyle. The light intensity, timing, and duration varies based on the mode and purpose. Boost energy, optimize the sleep-wake cycle, or even beat jet lag and adjust to the new time zone faster. There is some built-in flexibility in the timing of their use. The glasses are comfortable, with a sleek visor-like design that is unobtrusive. It is easy to charge the glasses by placing them in a pill-shaped pod that connects to a computer with a USB cable.

Luminette

For a lower price point, consider the light therapy glasses offered by Luminette. For $199 to buy, or $39 for a trial, similar technology is used to deliver the light therapy directly into the eyes. Unlike a light box, which may require 10,000 lux to be effective, the blue light directed into the eye accomplishes the same treatment with a lesser intensity. There are 3 intensity levels offered: 500, 1000, and 1500. The glasses themselves are larger, broadly situated above the eyes. It is recommended that they be used for 30 minutes daily for best effect.

Re-Timer

Similarly priced, at $199, Re-Timer delivers blue-green light into the eyes for the purposes of phototherapy. Designed to frame the eyes, these glasses were developed at a university based on 25 years of research. It is recommended that the glasses be used for 60 minutes daily, the longest recommended usage of the three models.

Conditions That Respond to Light

The circadian rhythms of the body are mostly affected by exposure to blue light. This part of the light spectrum is present in full-spectrum sunlight. It can also be isolated and delivered at a lower intensity with equivalent effectiveness. What conditions respond best to light therapy delivered via light glasses?

Seasonal affective disorder

Also known as winter depression, it occurs seasonally when the lack of light availability leads to a deterioration of mood. It may be associated with increased sleeping, lack of initiative and social isolation, and changes in appetite and weight gain.

Insomnia

Difficulty falling asleep may be especially responsive to the use of phototherapy. Artificial light exposure in the evening may be a problem, but using light glasses in the morning upon awakening may help to realign the circadian rhythm.

Delayed sleep phase syndrome

Night owls experience this condition that leads to both difficulty falling asleep at a conventional time as well as difficulty waking in the morning at an earlier time. Bedtimes may be at 2 a.m. or later and waking may naturally occur mid-morning or even mid-day. Though it does not necessarily have to be associated with insomnia, it often does when social pressures require sleep-wake timing that is not consistent with this genetic tendency.

Morning sleepiness

Difficulty getting out of bed in the morning due to sleepiness may be relieved with phototherapy. Light naturally wakes us. It initiates the circadian alerting signal. Consistent use in the morning may help to align sleep’s place to the darkness of the night.

Jet lag

In the modern age, jet travel allows a rapid misalignment of the body’s circadian rhythms to the patterns of light and darkness in the environment. It may take one day to adjust to each time zone crossed, but light therapy may make this adjustment occur more quickly. 

Cautions and Side Effects

Phototherapy is generally well tolerated. If it is bothersome, it should be discontinued. Any perceived side effects should resolve once the light glasses are no longer being used. In some cases, the following side effects may occur:

Headaches

Artificial light therapy may trigger headaches or migraines in those predisposed. In this case, a lower light intensity for a more prolonged period may be useful.

Insomnia

Light at the wrong time may lead to difficult sleeping. For example, using light glasses at bedtime may cause a shift in the timing of sleep later. This will make it hard to fall asleep, and hard to wake. Avoid this by following the instructions associated with the light glasses program.

Photophobia

Sensitivity to light may occur. This may lead to pain or simply an aversion to exposure characterized by squinting. It will go away when the light stimulus is removed.

Fatigue

Rarely, fatigue may occur with phototherapy. This may have to do with the changes that occur in the sleep-wake schedule. Following the directions of the program should help to minimize this risk.

Hypomania

For those who have a history of bipolar disorder, light therapy needs to be used with caution. There is a risk that the light may lead to a state of hypomania. This may be associated with an elevated mood, increased productivity, hypersexuality, or other symptoms.

Irritability

Although mood would typically improve with light therapy, in some cases it may lead to irritability. Like the other side effects, it should resolve by stopping the use of the light therapy glasses.

Importantly, there is no ultraviolet (UV) light exposure with the use of light therapy glasses. Therefore, the risks associated with this—such as damage to the eye or cancer—would not be present.

Conclusion

If you are interested in learning more about your sleep, consider evaluation by a board-certified sleep physician. In some cases, consultation with this specialist may optimize your response to the light therapy glasses. Should you experience any problems with their use, seek further assistance by an expert.

Sources:

Peters, BR. “Irregular Bedtimes and Awakenings.” Evaluation of Sleep Complaints. Sleep Med Clinic. 9(2014)481-489.

Reid, KJ and Zee, PC. “Circadian disorders of the sleep-wake cycle,” in Principles and Practices of Sleep Medicine. Edited by Kryger MH, Roth T, Dement WC. St. Louis, Missouri, Elsevier Saunders, 2011, pp. 470-482.

What Are the Symptoms of Sleep Deprivation?

Sleep is a vital biological function that supports every system in the human body. From restoring physical health to maintaining mental balance, adequate sleep is crucial for overall well-being. Yet, in today's fast-paced society, many people sacrifice sleep in favor of work, social commitments, or digital distractions. When the body and brain do not get the sleep they need, a condition known as sleep deprivation can occur. The symptoms of sleep deprivation vary in intensity depending on the duration and severity of the sleep loss, but even short-term deprivation can have noticeable effects. This article explores the physical, mental, emotional, and behavioral symptoms of sleep deprivation, and why recognizing them early is key to preventing more serious health consequences.

What Is Sleep Deprivation?

Sleep deprivation refers to a condition that occurs when an individual consistently gets less sleep than their body requires. Most adults need around 7 to 9 hours of sleep per night, though the ideal amount can vary slightly between individuals. Sleep deprivation may be acute (short-term, often lasting a few days) or chronic (long-term and persistent over weeks or months). In both cases, it disrupts the normal functioning of the brain and body.

Cognitive Symptoms

One of the first areas to show the effects of sleep deprivation is cognitive function. Sleep is critical for memory formation, attention, problem-solving, and learning. When someone is deprived of sleep, they may experience:

1. Reduced Attention and Concentration: Sleep-deprived individuals often find it difficult to stay focused on tasks. Their attention span shortens, and they may become easily distracted or forgetful.

2. Slower Reaction Times: A lack of sleep impairs the brain's ability to process and respond to information quickly. This can be particularly dangerous in situations requiring quick thinking, such as driving or operating machinery.

3. Impaired Judgment and Decision-Making: Sleep-deprived people are more likely to make poor decisions or take risks they normally wouldn't, due to a reduction in prefrontal cortex activity — the brain region responsible for rational thinking.

4. Memory Problems: Both short-term and long-term memory can suffer. Sleep helps consolidate memories, and without it, new information may not be effectively retained.

5. Difficulty Learning: Sleep deprivation can interfere with the brain’s ability to absorb and retain information, making learning new skills or knowledge more difficult.

Emotional and Psychological Symptoms

Sleep plays a vital role in emotional regulation and mental stability. When a person is sleep-deprived, their ability to manage stress and respond to emotional challenges is weakened. Common emotional symptoms include:

1. Irritability and Mood Swings: Small annoyances may feel more frustrating or upsetting when someone is sleep-deprived. Mood instability becomes more common.

2. Increased Anxiety and Stress: Lack of sleep can heighten anxiety levels and make everyday stressors feel overwhelming.

3. Depressive Symptoms: Chronic sleep deprivation is closely linked to depression. People may feel hopeless, lack motivation, or have a persistently low mood.

4. Emotional Reactivity: Individuals may overreact to situations or exhibit disproportionate emotional responses due to impaired regulation of the amygdala, the brain’s emotion center.

Physical Symptoms

Sleep is also crucial for maintaining bodily functions and promoting physical health. Physical symptoms of sleep deprivation include:

1. Fatigue and Lethargy: The most obvious symptom, fatigue makes it difficult to stay awake or be productive during the day. People often feel sluggish, drowsy, or physically weak.

2. Weakened Immune Function: Lack of sleep impairs the body’s ability to fight off infections. Sleep-deprived individuals are more prone to catching colds or other illnesses.

3. Headaches and Muscle Aches: Sleep loss can contribute to tension headaches and general discomfort in the muscles and joints.

4. Appetite Changes and Weight Gain: Sleep affects hormones like ghrelin and leptin that regulate hunger. Sleep deprivation increases appetite, particularly for high-calorie, sugary foods, contributing to weight gain.

5. Hormonal Imbalances: Sleep deprivation disrupts the release of growth hormone, insulin, cortisol, and other important regulators, impacting metabolism and stress responses.

Behavioral Symptoms

Sleep deprivation can also change how people behave and interact with others. These behavioral symptoms may include:

1. Clumsiness and Poor Coordination: Without adequate rest, motor skills become impaired, increasing the likelihood of accidents and injuries.

2. Reduced Motivation: Sleep-deprived individuals often lack the drive to complete tasks or engage in activities they normally enjoy.

3. Social Withdrawal: Fatigue and irritability may cause people to avoid social situations or become isolated from friends and family.

4. Increased Risk-Taking Behavior: Due to impaired judgment and decision-making, sleep-deprived individuals may engage in impulsive or risky behaviors.

Long-Term Consequences of Chronic Sleep Deprivation

If left unaddressed, chronic sleep deprivation can contribute to a number of serious health problems over time, including:

• Heart Disease: Persistent sleep loss is linked to high blood pressure, heart attacks, and stroke.

• Diabetes: Poor sleep can affect insulin sensitivity, increasing the risk of type 2 diabetes.

• Obesity: Hormonal changes triggered by sleep loss can lead to overeating and weight gain.

• Immune Dysfunction: This may increase the risk of infection or difficulty returning the body to normal health.

• Cognitive Decline: Chronic deprivation increases the risk of dementia and Alzheimer’s disease.

• Mental Health Disorders: Long-term sleep deprivation can exacerbate or even trigger anxiety disorders, depression, and bipolar disorder.

Recognizing the Warning Signs

Because the symptoms of sleep deprivation can mimic or overlap with those of other conditions, it’s important to monitor sleep habits closely and recognize the early warning signs:

• Falling asleep during daytime activities (such as while reading or watching TV)

• Needing multiple cups of coffee or other caffeine to stay alert

• Struggling to stay awake during meetings, lectures, or driving

• Waking up feeling unrefreshed despite a full night in bed

Conclusion

Sleep deprivation is more than just feeling tired — it’s a serious condition that affects virtually every aspect of life, from physical health to mental clarity and emotional resilience. Recognizing the symptoms early can help individuals take the necessary steps to improve sleep quality and prevent long-term damage. Most adults need 7 to 9 hours of quality sleep to avoid the effects of sleep deprivation, and treatment of underlying sleep disorders like sleep apnea may be important. Whether it’s adjusting lifestyle habits, improving sleep hygiene, or seeking medical support, prioritizing sleep is an investment in health, safety, and well-being.

This article was created using OpenAI’s ChatGPT on May 16, 2025 and it was personally reviewed and edited by Brandon Peters, M.D. to ensure its accuracy. This use of augmented intelligence in this way allows the creation of health information that can be trusted.

Can Stress Cause Teeth Grinding or Bruxism?

Teeth grinding, medically known as bruxism, is a condition where a person clenches or grinds their teeth, often unconsciously. It can occur during the day or, more commonly, at night during sleep. While bruxism is sometimes attributed to other factors such as misaligned teeth or a medical condition, stress is widely recognized as one of the most significant triggers of teeth grinding. This article explores the relationship between stress and bruxism, shedding light on how stress affects the body, the impact of teeth grinding, and strategies to reduce or prevent bruxism.

Understanding Bruxism

Bruxism is a condition characterized by the involuntary grinding or clenching of teeth. It can occur during the day (awake bruxism) or during sleep (sleep bruxism), with the latter being more common. Bruxism may be mild or severe and can lead to a range of dental and health problems. The signs and symptoms of bruxism may include:

• Worn or flattened teeth: Prolonged grinding can flatten or wear down tooth surfaces.

• Jaw pain or tightness: The constant clenching or grinding of teeth can strain the muscles of the jaw and face.

• Headaches: Tension in the jaw muscles can radiate to the head, causing tension headaches, often localized to the back of the head.

• Tooth sensitivity: Grinding can wear down enamel, leading to tooth sensitivity to hot, cold, or sweet foods.

• Earache or facial pain: The muscles of the jaw are interconnected with the muscles of the face and ears, leading to referred pain in these areas.

• Disrupted sleep: Sleep bruxism can affect both the person with the condition and their partner, causing poor sleep quality.

The Link Between Stress and Bruxism

Stress is widely considered one of the primary causes of bruxism, although the exact mechanism by which it triggers teeth grinding is not completely understood. The relationship between stress and bruxism can be explained by how stress impacts the body, particularly the muscles and nervous system.

The Role of the Stress Response

Stress activates the body’s “fight or flight” response, which is a physiological reaction designed to prepare the body to face a perceived threat. This response involves the release of stress hormones like cortisol and adrenaline, which increase heart rate, blood pressure, and muscle tension. One of the most noticeable physical effects of stress is muscle tightness, especially in the jaw, neck, and shoulders. The jaw muscles, in particular, are prone to involuntary clenching when a person is stressed or anxious.

When stress is chronic, these muscle contractions can become habitual, leading to bruxism. People under high levels of stress or emotional pressure may unconsciously clench their jaws or grind their teeth, even without realizing it. This can happen during waking hours (especially when concentrating or feeling tense) or while sleeping.

Emotional Stress and Tension

Emotional stress, such as anxiety, depression, or frustration, is often a significant factor in teeth grinding. When a person is emotionally overwhelmed, they may experience heightened nervous tension that manifests in physical ways. One of these physical responses can be teeth grinding. This can occur consciously or unconsciously, particularly when people are anxious, angry, or frustrated. In these cases, teeth grinding may serve as an outlet for the built-up emotional tension.

Sleep Stress and Bruxism

Stress is not only a daytime issue. In fact, many people grind their teeth during sleep without even realizing it. Sleep bruxism is thought to be influenced by both psychological and physical stress. High levels of daytime stress or anxiety can spill over into the night, leading to involuntary clenching or grinding while asleep. This type of bruxism is more difficult to control because the person is not consciously aware of it. As a result, the physical effects of sleep bruxism can be more severe, as the grinding can occur for hours at a time during the night.

Sleep disorders such as sleep apnea, snoring, or insomnia can also exacerbate bruxism. The constant interruptions in sleep, the body’s fight-or-flight response, and the lack of restful sleep can all contribute to the development or worsening of teeth grinding. Sleep apnea is a major contributor to sleep-related bruxism that is often overlooked.

Stress and the Nervous System

The nervous system plays a critical role in stress and bruxism. When a person experiences stress, the sympathetic nervous system is activated, increasing the body’s readiness for fight or flight. However, when stress is chronic or ongoing, the nervous system remains in a heightened state of arousal. This prolonged activation of the nervous system can lead to muscle tightness, jaw clenching, and teeth grinding, especially during periods of rest, like sleep.

The autonomic nervous system, which controls involuntary bodily functions, can also influence bruxism. In people with a heightened stress response, this system may be overly sensitive or reactive, making it more likely for the body to engage in habits like teeth grinding as a response to tension or frustration.

The Impact of Teeth Grinding on Health

While bruxism is often dismissed as a mere habit or an annoyance, it can have significant consequences for oral health and overall well-being. The physical damage caused by bruxism, as well as the associated discomfort, can be both painful and costly to address.

Dental Damage

The most obvious consequence of bruxism is damage to the teeth. Prolonged grinding can lead to worn-down enamel, cracked or chipped teeth, and even tooth loss in extreme cases. As enamel is worn away, the underlying dentin may become exposed, leading to increased tooth sensitivity to hot, cold, and sweet foods.

In some cases, the grinding can cause misalignment of the teeth or damage to dental work like fillings, crowns, or bridges. This can lead to the need for costly dental repairs or replacements.

Jaw and Muscle Pain

Chronic bruxism can lead to temporomandibular joint (TMJ) disorders, which affect the joints connecting the jaw to the skull. The constant clenching and grinding of teeth put excessive pressure on these joints, leading to pain, clicking, or popping sounds when opening or closing the mouth. This can result in difficulty chewing or talking and may cause headaches or earaches due to the strain on the jaw muscles.

Additionally, the muscles involved in bruxism can become fatigued and sore. People who grind their teeth regularly may experience tension in their jaw, neck, and shoulders, leading to a reduction in overall comfort and mobility.

Sleep Disruptions

Teeth grinding, especially during sleep, can disrupt both the grinder’s and their partner’s sleep. The noise generated by grinding can be loud enough to disturb the sleep of others, and the discomfort caused by jaw pain can make it difficult to get a restful night’s sleep. This lack of restorative sleep can, in turn, lead to increased stress, creating a vicious cycle of stress, bruxism, and sleep disturbances.

Headaches

One of the common side effects of bruxism is headaches. The constant clenching and grinding of teeth during the night can lead to tension headaches, particularly around the temples and forehead and at the back of the head. The muscle tightness may extend into the neck and shoulders. These headaches can vary in severity and may be chronic for those who grind their teeth regularly.

Managing Stress-Induced Bruxism

The key to managing bruxism is breaking the cycle of stress that contributes to it. There are several approaches, both behavioral and medical, that can help reduce the frequency and severity of teeth grinding.

Stress Management Techniques

Since stress is a major trigger for bruxism, effective stress management is crucial in preventing or reducing teeth grinding. Techniques like mindfulness meditation, deep breathing exercises, yoga, and progressive muscle relaxation can help reduce stress and promote relaxation. Regular physical exercise is also beneficial for relieving stress and releasing built-up tension in the body.

Cognitive Behavioral Therapy (CBT)

For individuals whose bruxism is strongly linked to emotional stress or anxiety, Cognitive Behavioral Therapy (CBT) can be an effective treatment. CBT helps individuals identify and challenge negative thought patterns and behaviors that contribute to stress, anxiety, and bruxism. By learning healthier ways to cope with stress, individuals may reduce the likelihood of teeth grinding.

Mouthguards and Splints

For those with severe bruxism, particularly sleep bruxism, a dentist may recommend a mouthguard or splint. These dental devices help protect the teeth from damage caused by grinding and can reduce the pressure on the jaw muscles. While they do not address the underlying cause of bruxism, they can help prevent further dental damage and reduce discomfort.

Medical Intervention

In cases of chronic bruxism, particularly if associated with anxiety or sleep disorders, medical intervention may be necessary. It is recommended that all sleep-related bruxism should prompt a sleep study to look for sleep apnea. Medications such as muscle relaxants, anti-anxiety drugs, or antidepressants may be prescribed to help manage the symptoms of stress and reduce the tendency to grind teeth. Injections of botulinum toxin (i.e., Botox) can also help to relax muscles over a longer period of time. However, medications should always be used under the supervision of a healthcare provider.

Conclusion

Stress is indeed a significant trigger for bruxism, with emotional and physical stress contributing to both daytime and nighttime teeth grinding. While bruxism can lead to dental damage, jaw pain, headaches, and disrupted sleep, the good news is that there are effective strategies to reduce stress and manage bruxism. By implementing stress management techniques, using mouthguards, and seeking professional help to look for sleep apnea, individuals can alleviate the negative effects of teeth grinding and improve their overall quality of life.

This article was created using OpenAI’s ChatGPT on December 2, 2024 and it was personally reviewed and edited by Brandon Peters, M.D. to ensure its accuracy. This use of augmented intelligence in this way allows the creation of health information that can be trusted.