3D Eye System Reconstruction for Precise Ocular Measurements
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Solution Overview
Problem
Current methods for determining ocular and optical measurements for corrective spectacle lenses are imprecise and time-consuming, leading to errors in lens fitting due to limitations in measuring pupillary distance, monopupillary distance, and segment heights, especially for varying viewing angles and distances, which affect vision comfort and accuracy.
Innovation Solution
A method using a camera-based protocol to model the eye system in three dimensions, allowing for simultaneous measurement of ocular and optical parameters such as pupillary distance, monopupillary distance, and pentoscopic angle, enabling precise lens adaptation to individual eye shapes and orientations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional measurement tools and procedures are used, then the measurement process is simple to operate, but the measurement precision is insufficient leading to errors in lens fitting
Solution Approach 1:
The patent transitions from traditional two-dimensional measurement approaches to three-dimensional eye system reconstruction. By capturing images from multiple viewpoints and reconstructing the eye system in 3D space, the method achieves precise measurement of ocular and optical parameters including pupillary distance, monopupillary distance, and segment heights, resolving the contradiction between measurement precision and device complexity
Solution Approach 2:
The patent introduces a camera-based imaging system as an intermediary to capture visual information of the eye system. Multiple images are taken from different angles and processed through computational algorithms to reconstruct the three-dimensional eye model, serving as a mediator between the physical eye system and the measurement data, thereby achieving high precision without direct complex contact measurement devices
2Productivity
If traditional measurement methods are used, then the equipment is simple, but the measurement time is excessive and not efficient
Solution Approach 1:
The patent performs preliminary action by capturing multiple images of the eye system from different viewpoints in advance. These pre-captured images are then processed through three-dimensional reconstruction algorithms to simultaneously obtain all necessary ocular and optical measurements, eliminating the need for sequential traditional measurements and significantly reducing total measurement time
Solution Approach 2:
The patent merges multiple measurement functions into a single integrated three-dimensional reconstruction process. By combining the capture of pupillary distance, monopupillary distance, segment heights, and other optical parameters into one unified imaging and reconstruction workflow, the system achieves high measurement productivity while minimizing the time loss associated with multiple separate measurement procedures
3Manufacturing precision
If measurements are taken for different viewing angles and distances, then the lens fitting accuracy is improved, but the number of measurements increases requiring more time
Solution Approach 1:
The patent uses three-dimensional reconstruction to capture eye system geometry from multiple viewpoints simultaneously. By building a comprehensive 3D model of the eye system that incorporates various viewing angles and distances, the method achieves high lens fitting accuracy while avoiding the need for sequential measurements at each angle, thus maintaining measurement speed
Solution Approach 2:
The patent implements feedback through the three-dimensional reconstruction process, where measurements from multiple viewpoints are integrated and validated against each other. The reconstructed eye model provides feedback on the consistency and accuracy of measurements taken at different angles and distances, allowing for efficient optimization of lens fitting parameters without requiring excessive measurement time
Data Source
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AI summary
The present invention relates to a method for determining ocular and optical measurements for the production and fitting of corrective eyeglasses for a user, with the aid of a camera, characterized in that it uses a protocol for reconstructing the system of the user's eyes in three dimensions by modelling of the system of the eye. This method uses test objects connected or not connected to the user's face. The method according to the invention thus makes it possible to carry out precise ocular and optical measurements.