You can use the Eye Measure app to verify your interpupillary distance (IPD) for the Bigscreen Beyond, but it's essential to understand its limitations and how it compares to other methods.
Eye Measure App
The Eye Measure app is a free iOS application developed by Dotty Digital, which uses the TrueDepth camera on newer iPhone and iPad Pro models to measure IPD. It claims an accuracy of 0.5 mm, which is generally reliable for most purposes, including VR headsets like the Bigscreen Beyond[4][7]. The app provides both near and far IPD measurements, with the far IPD being more relevant for VR headsets. This is because VR headsets are typically adjusted to match your far IPD to ensure optimal image quality and comfort[5][7].
Comparison with Other Methods
1. Bigscreen Beyond Facial Scan: Some users have reported discrepancies between the IPD measured by the Bigscreen Beyond's facial scan and other methods. For instance, one user found a significant difference between their eye doctor's measurement and the scan result[2]. Therefore, using the Eye Measure app can provide an additional verification point.
2. Manual Measurements: Traditional methods involve using a ruler or calipers to measure IPD. While these methods can be less precise, they offer a manual alternative for verification[4][8].
3. Professional Measurements: For the most accurate results, consulting an eye doctor is recommended. Professional measurements are typically more reliable than any app or manual method[2].
Conclusion
The Eye Measure app can be a useful tool for verifying your IPD for the Bigscreen Beyond, especially if you have access to an iPhone or iPad Pro with a TrueDepth camera. However, if possible, it's advisable to cross-check with other methods, such as a professional measurement or manual verification, to ensure accuracy. This is particularly important for achieving optimal visual quality with VR headsets.
Citations:
[1] https://pmc.ncbi.nlm.nih.gov/articles/PMC10389117/
[2] https://www.reddit.com/r/virtualreality/comments/18z3140/bigscreen_beyond_do_not_trust_scan_ipd_measurement/
[3] https://store.bigscreenvr.com/en-jp/blogs/beyond/development-update-8
[4] https://medical3danimationcompany.com/how-to-measure-your-ipd/
[5] https://www.youtube.com/watch?v=Sa6YsKVRqEE
[6] https://news.ycombinator.com/item?id=34775061
[7] https://www.roadtovr.com/how-to-measure-ipd-vr-headset-ar-iphone-app/
[8] https://www.youtube.com/watch?v=F5CKUl9bU4M
[9] https://www.uploadvr.com/bigscreen-beyond-2-and-beyond-2e-announced/