FAQ

The procedure is very simple. You rest your chin and forehead on the testing device, and a photo of your eye is taken. Unlike blood tests or CT scans, there's no needle involved or radiation exposure, making it completely safe and comfortable.

The effectiveness of using this product to predict cardiovascular disease has been validated by numerous case studies and publications in prominent journals such as The Lancet. It has also been officially approved by regulatory agencies like Korea's MFDS and Europe’s CE authorities.

No specific preparation is required. However, avoid activities that could affect autonomic nervous system balance or retinal blood flow just before the test—like smoking, caffeine, intense light exposure, or sudden temperature changes. It's recommended to wait at least one hour after taking hypertension medication and at least eight hours after alcohol consumption before testing.
* Evidence: https://doi.org/10.1111/aos.16938: Significant changes in vessel density observed after sympathetic/parasympathetic activation.
* Schuster et al., 2014: Meaningful correlation between HRV and retinal vessels.

It depends on the type of surgery. After uncomplicated cataract surgery, media opacity typically clears within a month, but waiting up to 3 months is recommended for higher accuracy. For laser-based surgeries, it's best to wait at least 4 months before testing.
* Evidence: https://doi.org/10.1186/s12886-020-01491-0: Up to 4 months recovery after LASIK.
https://doi.org/10.1371/journal.pone.0284181: Media opacity significantly reduced after 3 months post-surgery.