Meta unveils Aria Gen 2 smart glasses with upgraded sensors and on-device processing

Meta has filled in the technical picture for Aria Gen 2, the research-grade smart glasses it first showed in February. The company released detailed specifications this week, laying out a device that represents a meaningful leap forward from the original Aria platform that launched in 2020. These glasses are not consumer products—they're built for researchers working on machine perception, contextual AI, and robotics—but the innovations developed here often find their way into products the rest of us will eventually wear.

The physical form has been engineered with practicality in mind. The glasses weigh approximately 75 grams and fold at the arms for easier carrying. Meta offers them in eight different size variations to fit a broader range of face shapes, a recognition that research participants come in different sizes and that comfort matters when you're asking people to wear something for extended periods. This attention to wearability signals that the company is thinking beyond the lab bench, toward real-world deployment scenarios.

The sensor array is where the upgrade becomes substantial. Aria Gen 2 includes an advanced eye-tracking system that captures detailed gaze information for each eye separately, detects blinks, and measures pupil characteristics. The nosepad houses photoplethysmography sensors—the kind that measure blood flow through the skin—alongside a contact microphone designed to capture clearer audio. An ambient light sensor rounds out the package, capable of distinguishing between indoor and outdoor lighting conditions using ultraviolet detection.

The computer vision system has been significantly enhanced. Where the first generation had two cameras, Aria Gen 2 carries four global shutter cameras. These cameras can capture images with a dynamic range of 120 decibels, compared to 70 decibels in the original—a substantial improvement that allows the system to perform well whether you're in bright sunlight or dim indoor spaces. The stereo overlap between cameras has expanded from 35 degrees to 80 degrees, giving the glasses much better depth perception and spatial awareness, which matters for the 3D models and spatial understanding that researchers are building.

On-device processing has been a key focus. Meta designed a custom energy-efficient co-processor that runs machine perception tasks in real time, without needing to send data to a server. This includes Visual Inertial Odometry—a technique that tracks the glasses' position and orientation in three-dimensional space with six degrees of freedom—and a 3D hand tracking solution that understands where your hands are and what they're doing. For researchers coordinating multiple devices, the glasses include a SubGHz radio system that synchronizes timing across devices with sub-millisecond accuracy, precise enough for serious scientific work.

Meta is currently showing Aria Gen 2 at the CVPR 2025 conference in Nashville and plans to open applications for researchers later this year. The company has suggested that roughly half a dozen consumer-oriented smart glasses are in the pipeline for release over the next year or two, and the innovations developed through the Aria research platform are expected to trickle down into those products. What researchers test and validate now—better eye tracking, improved depth sensing, on-device processing that doesn't require constant cloud connectivity—may well become features in glasses designed for everyday use.