The future of wearables: What are smart glasses?

Smart glasses are wearable devices that combine the physical environment with digital information. They have a similar appearance to conventional eyewear but contain technologies such as audio systems and transparent displays that can present information directly to the wearer. As a result, users can interact with the physical world while simultaneously accessing digital or virtual content.

Evolution of smart glasses

Although smart glasses became widely known as a wearable technology during the early 2010s, their roots go back further. One of the pioneers was Professor Steve Mann, who is often described as the “Father of Wearable Computing.” His early wearable system could record the scene viewed by the user while also processing that visual information and placing digital content over it.

These early devices were relatively large and remained experimental. Their use was therefore largely restricted to academic and research environments.

Advances in artificial intelligence have changed what is possible with wearable technology. Modern computing systems can now be integrated into smaller and more comfortable devices, allowing smart glasses to move beyond laboratories and into everyday applications. Today's versions are more compact, refined and designed with practical daily use in mind.

How smart glasses work

Modern smart glasses combine a variety of hardware components with sophisticated systems for processing information. Their primary technologies include cameras, processors, sensors and wireless connectivity.

Cameras in smart glasses

Cameras are among the most important components in smart glasses because they collect much of the visual information required for interactive functions.

Cameras on the frame

Smart glasses can contain several small, high-resolution cameras positioned around the frame. Two cameras may be positioned near the eyes to monitor eye movement and determine where the wearer is looking. Another camera, usually located toward the center of the frame, captures the surrounding environment and the objects within the user's field of view.

Awareness capabilities

The glasses combine information gathered from eye-tracking cameras with visual information from the outward-facing camera. This combination helps the system determine what the wearer is looking at and understand elements of the surrounding scene.

This awareness system can support functions such as identifying faces, following moving objects, recognizing hand gestures and interpreting the visual environment.

Processors in smart glasses

Smart glasses must handle large quantities of information while operating in real time. To achieve this, they rely on advanced processing systems capable of rapidly interpreting data collected while the glasses are being worn.

Handling units

A processor, sometimes referred to as a handling unit, manages many of the functions performed by the glasses. Specialized AI chips can rapidly analyze information from cameras, microphones and other sensors.

The processor may also be responsible for generating augmented reality content on the lenses, interpreting spoken instructions and running sophisticated artificial intelligence systems that can offer personalized information, suggestions and assistance.

Neural processor units

Processing all of these functions can normally consume substantial amounts of electrical power, which would quickly reduce battery life. Smart glasses therefore use specialized neural processor units, or NPUs, that are designed specifically for artificial intelligence calculations.

NPUs can perform complex AI operations while using relatively little energy. Rather than transferring every piece of information to a remote server for processing, many calculations can take place directly on the glasses. This approach can reduce delays and make responses faster and more immediate.

Sensors in smart glasses

Smart glasses contain a variety of small sensors that gather information about the wearer and the surrounding environment. Working together, these sensors allow the glasses to understand movement, location and other conditions.

Body sensors

Body-related sensors continuously collect information while the wearer moves through everyday activities.

Inertial measurement units and accelerometers detect how the glasses move as the wearer turns their head, walks, changes direction or shifts position. This information helps the device understand movement and adjust its display accordingly.

Smart glasses designed for health applications can also incorporate specialized biosensors. These sensors can monitor wellness information such as heart rate, blood pressure and body temperature.

By continuously gathering this information, health-oriented smart glasses can monitor vital signs without requiring the wearer to stop and use a separate monitoring device.

Location sensors

Smart glasses can also use location-related technologies. GPS modules can determine the user's position, while LIDAR, which stands for Light Detection and Ranging, can scan the surrounding environment and create detailed spatial information.

When combined, these technologies can help the glasses construct accurate three-dimensional representations of the environment and determine the user's position relative to nearby objects.

Connectivity in smart glasses

Wireless connectivity is an important part of the smart-glasses experience. The devices may need internet access, communication with smartphones and connections to online services and platforms.

Bluetooth and Wi-Fi

Bluetooth and Wi-Fi are commonly used to keep smart glasses connected while limiting the amount of processing and communication that needs to happen directly through the glasses. A wireless connection can link the glasses with a smartphone, allowing certain processing tasks to be transferred to the phone.

Wireless networks

For applications that require fast communication, such as telemedicine, smart glasses may connect through high-speed 5G networks. This can allow video and health information to be transmitted to medical professionals during real-time consultations.

Cloud-based platform

Smart glasses may collect information about the user's activities, surroundings and health throughout the day. Through a wireless connection, this information can be transferred to cloud-based systems where it can be stored and analyzed.

Health-related information can then be processed by healthcare professionals or software systems. The resulting analysis can provide personalized observations and recommendations based on the collected information.

Key features of smart glasses

Smart glasses can support many different functions, including displaying information in real time, assisting with everyday activities and monitoring aspects of health. Several core technologies make these capabilities possible.

Augmented reality

Augmented reality is one of the central technologies behind smart glasses. AR places digital information such as text, images, three-dimensional objects and sounds over the user's view of the physical world.

Unlike virtual reality, which replaces the surrounding environment with a completely digital setting, augmented reality preserves the real environment and adds digital material to it.

Smart glasses use displays or projection systems to place computer-generated information within the user's field of vision. More advanced AI systems, including technology sometimes described as neural holography, can create virtual objects with convincing depth perception, making them appear more naturally integrated into the physical environment.

This ability can support applications such as navigation, real-time language translation, entertainment and photography.

Newer generations of smart glasses are becoming increasingly compact while incorporating holographic imaging and artificial intelligence. These developments can allow the devices to present full-color three-dimensional imagery that moves and appears more realistic.

Voice control

Many smart glasses provide voice-control capabilities that allow users to interact with virtual assistants without physically manipulating the device. Some models also include touch-sensitive controls built into the frame.

Through these controls, users can change the volume, pause or resume content, listen to music and answer telephone calls without requiring separate headphones.

Eye tracking

Advanced smart glasses can incorporate eye-tracking technology to determine exactly where the wearer is looking. This information helps the system understand the user's attention and deliver relevant information at the appropriate moment.

When eye tracking is combined with mixed-reality displays, digital content can be positioned according to what the wearer is viewing.

Modern smart glasses can also combine several other forms of input, including body-movement tracking, facial-expression recognition and voice recognition. Together, these systems provide multiple ways for the user to interact with the device.

Camera and recording capabilities

Some smart glasses are equipped with cameras and audio-recording systems capable of capturing photographs and video. Recording can generally be initiated through a physical button or a voice command.

Captured media can be stored temporarily on the glasses and then transferred to a smartphone through a companion mobile application for viewing, storage and sharing.

Some newer models also provide live-streaming capabilities that allow users to broadcast captured content directly to social media platforms.

AI-powered learning and assistance

Artificial intelligence is becoming an increasingly common feature in modern smart glasses. This technology can provide accessible assistance across education, daily activities and specialized applications.

For students

AI systems integrated into smart glasses can support learning by providing definitions, summaries and explanations of unfamiliar subjects and concepts.

For example, students studying biology may be able to examine three-dimensional representations of cells or organs as part of their coursework. The cameras can also capture photographs and video, giving students another way to record notes, observations and educational material.

For the visually impaired or blind

Specialized smart glasses can provide assistance for people who are blind or have low vision. By combining AI, audio instructions and vibration-based feedback, these devices can function as a type of virtual guide.

The glasses can identify potential hazards such as stairs and puddles and can help users move around obstacles. Audio signals and vibrations can then provide guidance as the wearer navigates through the surrounding environment.

Applications of smart glasses

Smart glasses are being developed for a growing number of uses, including health care, education, accessibility, entertainment and fitness.

Smart glasses in health care

The technology is increasingly being explored for a variety of medical purposes.

Surgery assistance

During medical procedures, smart glasses can assist surgeons by presenting useful information directly within their field of vision. Augmented reality can overlay medical data, instructions or other guidance while a procedure is taking place.

This ability to provide information without requiring the user to look away from the procedure can make smart glasses a potentially useful medical tool.

Health monitoring

Smart glasses can also support continuous health monitoring by collecting information about the body and surrounding environment during normal daily activities.

Real-time monitoring can help individuals observe and manage long-term health conditions. Through sensors and artificial intelligence, smart glasses can continuously follow measurements such as heart rate, physical activity and other health-related indicators.

Coordinated patient care

The continuous information collected by smart glasses can help doctors and patients follow changes in health over time. The data can be used to observe disease progression, identify changes at an earlier stage and support more informed treatment decisions.

After information is collected, the device's sensors and processors can analyze it and provide feedback or recommendations in real time. This coordinated approach allows the glasses to respond to the wearer's current activity and health situation and provide potentially useful guidance.

Smart glasses in education

Smart glasses can create more interactive learning experiences by combining educational material with visual information presented directly within the student's surroundings.

Language translation

Real-time translation is one possible educational application. Smart glasses can translate spoken conversations and written material between different languages, helping students communicate and understand information in multilingual environments.

Math and science

The technology can also assist with mathematics and science. Built-in cameras can be used to determine measurements such as height and distance, which can support practical mathematical and scientific tasks.

Artificial intelligence can additionally analyze equations and other academic problems, helping students understand the steps involved in solving them.

Computer code

Smart glasses can also provide assistance to students learning programming. When a piece of code fails to operate correctly, the student can present it to the glasses.

The AI system can analyze the code, identify the programming language, locate possible errors and offer general guidance. This can help students understand debugging and develop their own problem-solving abilities.

Smart glasses in entertainment and fitness

Smart glasses can provide interactive entertainment experiences that extend beyond conventional screens. They can be used for gaming and other entertainment or exercise activities in which immersive visual information can enhance the experience.

Speakers integrated into the frames can also provide audio without requiring separate headphones. Users can listen to music, podcasts and other audio content while keeping the device relatively discreet.

Challenges and limitations

Despite their many capabilities, smart glasses still face challenges involving technology, comfort, privacy, social interaction and potential health concerns.

Privacy concerns

Because smart glasses can capture photographs, video and sound, privacy is an important issue. The devices could unintentionally record sensitive material, including confidential documents or information such as PIN codes.

Industry standards

For smart glasses to become dependable tools in areas such as medicine and education, appropriate testing and clinical validation are necessary. Establishing reliable standards will be important for specialized applications.

Battery life

Current smart glasses can consume battery power relatively quickly, particularly when advanced functions such as cameras, displays, sensors and artificial intelligence are being used. This can limit how long they can operate before requiring recharging.

Social limitations

Wearing smart glasses may also influence normal social interactions. Other people may feel uncertain about whether they are being recorded, while the wearer may experience challenges maintaining natural face-to-face communication.

Eye strain and vision changes

Using digital displays for extended periods can contribute to digital eye strain. Long periods of interaction with smart glasses may therefore require attention to visual comfort.

Motion sickness and accessibility issues

Extended use can also cause cybersickness in some users. This may produce sensations of disorientation or nausea similar to motion sickness. Accessibility and individual tolerance therefore remain important considerations.

The future of smart glasses

Future generations of smart glasses are expected to combine increasingly capable artificial intelligence with wearable computing.

Advanced health monitoring

Future devices may become better at learning an individual's health patterns and daily routines. By continuously analyzing this information, smart glasses could provide increasingly personalized assistance and health-related observations.

Activity recommendations

Smart glasses may combine information such as heart rate and body temperature with weather and other environmental conditions. This could allow the system to recommend suitable times or conditions for activities such as exercise.

Improved voice commands

Voice-recognition technology is also expected to become more capable. More advanced systems could understand complicated instructions and continue responding accurately even when the surrounding environment is noisy.

Sophisticated gesture controls

Future smart glasses may recognize a much broader range of hand movements. Instead of touching the device, users could control different functions through simple gestures.

New touch feedback technology

Additional forms of tactile feedback, including gentle vibrations, could provide users with another method of receiving information and controlling the glasses.

Enhanced assistance capabilities

Improvements to cameras, microphones, GPS systems and other sensors could further expand the accessibility functions of smart glasses. These developments may provide more effective assistance for people with visual impairments and other disabilities.

Embracing the future with smart glasses

Smart glasses are becoming increasingly practical as their hardware and software capabilities continue to improve. Modern devices are easier to use and can perform a growing range of sophisticated tasks.

The combination of physical surroundings and digital information is continuing to develop rapidly. As cameras, audio systems, sensors, processors and control methods improve, smart glasses are likely to find broader applications in health care, education, workplaces and everyday activities.

These developments could make smart glasses an increasingly important part of wearable technology, providing users with information, assistance and interactive digital content without requiring them to constantly look down at a separate screen.