3D-printed frame
The main structural element supporting the headset geometry and component placement.
Hardware
Hardware architecture and physical design.
Using MEYELens is easy. Follow these steps to build your complete 3D-printed platform for pupillometry and eye tracking.
Overview
The hardware is centered on a 3D-printed wearable frame that can support one or more camera modules while allowing positional adjustment relative to the eye. The design emphasizes reproducibility, low cost, and practical adaptability across different users and experimental contexts.
The frame includes support elements for the front structure, nose positioning, side arms, and camera mounting. Depending on the intended use, the system can be assembled in simpler or more extended configurations, ranging from monocular pupil recording to combined eye-facing and world-facing acquisition.
Main components
The system is composed of a small set of modular physical elements.
Eye-facing camera
Used for pupil detection and eye-position estimation.
World-facing camera
Optional module for scene capture and naturalistic gaze mapping.
Infrared illumination
Used when needed to improve pupil visibility and segmentation quality.
Fasteners
Standard screws and nuts used to assemble and stabilize the structure.
Cabling and connection
USB-based connection to a host computer or portable embedded system.
Hardware configurations
MEYELens supports multiple hardware configurations. A single-camera setup can be used for pupil recording and stabilized gaze tasks, while a dual-camera arrangement enables mapping between eye position and the surrounding scene. This modularity allows the physical system to be adapted to different protocols without redesigning the entire frame.
Single-camera setup
- Eye-facing camera only
- Suitable for pupillometry
- Useful for stabilized or screen-based paradigms
Dual-camera setup
- Eye-facing + world-facing camera
- Suitable for gaze mapping
- Useful for naturalistic tasks
Bill of materials
Example structure for the core hardware inventory.
| Component | Description | Quantity | Notes | Price per Unit(€) | Link |
|---|---|---|---|---|---|
| Printing filament | PLA or TPU | 1 | 3D-printed | 1.43 | Open |
| Eye-facing camera | Primary recording camera | 1 | Required | 7.19-14.38 | Open |
| World-facing camera | Scene camera for gaze mapping | 1 | Optional | 7.19-14.38 | Open |
| Fasteners | M3 and M2 Screws and nuts | Multiple | Required | 1.23 | Open |
| IR illumination | External LED source | 1 | Depends on the setup | 41.2 | Open |
3D-printed parts
The structural parts of the headset are designed for additive manufacturing and can be distributed as ready-to-print files. This makes the system easy to reproduce and modify.
Included elements
- Front frame
- Arms and supports
- Camera mount components
- Nose support elements
Suggested additions
- Exploded render
- Print-bed photo
- Annotated component image
- Link to downloadable files
Cameras and illumination
The platform is compatible with low-cost camera modules suitable for eye and scene capture. Depending on the module used, infrared illumination may be integrated or added externally. This section can later be expanded with camera specifications, field-of-view options, and example mounting arrangements.
Assembly overview
Assembly consists of mounting the printed parts, installing the camera support, securing the camera module, and routing cables. This page can provide a concise summary, while the procedural details remain in the Get Started or documentation pages.
For full instructions, link this section to a dedicated assembly guide rather than placing every procedural detail here.
Images and video
This section can host photos, schematics, or short demonstrations.
Short hardware overview or assembly clip.