Visuo-Postural Refraction Measurement for Personalized Lens Design

The patent applies preliminary action by measuring the individual's visuo-postural parameters (head position, eye position, reading distance) before performing the refraction measurement. This allows the measuring device to be pre-adjusted to match the individual's natural posture and viewing conditions, ensuring that the subsequent refraction measurement is performed under optimal and personalized conditions, thereby improving measurement precision without requiring complex real-time adjustments during the measurement process.

The patent applies parameter changes by modifying the adjustment parameters of the measuring device based on the individual's visuo-postural characteristics. Specifically, the device adjusts parameters such as the viewing distance, head angle, and eye position to match the individual's natural posture and reading habits. This customization of measurement parameters ensures that the refraction measurement reflects the individual's actual visual needs under their typical viewing conditions, thereby improving the reliability and suitability of the resulting prescription.

The patent applies dynamics by making the test distance adjustable rather than fixed at standardized values. The system dynamically determines the individual's actual reading distance through visuo-postural measurement and automatically adjusts the visual acuity test distance to match this personalized value. This dynamic adaptation ensures that the visual acuity measurement is performed at the distance where the individual naturally reads, improving measurement accuracy while maintaining testing efficiency through automated distance adjustment.