Global Sensitivity Parameter for Ophthalmic Lens Adaptation
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Solution Overview
Problem
Current methods for determining optical sensitivity parameters for ophthalmic lenses are limited, as they provide single values that are not reliable for generalizing sensitivity to optical features, leading to uncertainty in lens adaptation for improved vision and are prone to measurement errors.
Innovation Solution
A method to determine a global sensitivity parameter by combining single sensitivity parameters for dioptric optical features of ophthalmic lenses, using computing means to assess the subject's sensitivity to variations in optical features, which can be applied across different environmental conditions and used for selecting appropriate optical designs and modifying existing designs for improved vision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If single sensitivity parameters are determined for different optical features, then measurement data is obtained, but the reliability and repeatability of sensitivity assessment is insufficient
Solution Approach 1:
The patent combines multiple single sensitivity parameters (sphere sensitivity, cylinder sensitivity, axis sensitivity, addition sensitivity) into a single global sensitivity parameter through mathematical combination. This merging process integrates separate measurements into a unified assessment, improving reliability while maintaining measurement precision.
Solution Approach 2:
The patent transforms individual sensitivity parameters into a global sensitivity parameter by changing the parameter representation from multiple separate values to a single comprehensive value. This parameter transformation enables more reliable generalization of sensitivity assessment across different optical features.
2Loss of information
If single sensitivity parameter values are used for different optical features, then individual measurements are obtained, but generalization of sensitivity to optical features becomes impossible
Solution Approach 1:
The global sensitivity parameter serves multiple functions and applies universally across different optical features (sphere, cylinder, axis, addition). This single parameter can be used to assess sensitivity to any dioptric optical feature variation, enabling broad generalization while preserving the specific sensitivity information from individual measurements.
3Measurement precision
If single sensitivity parameters are determined separately, then individual optical feature sensitivity is measured, but measurement uncertainty affects the overall assessment
Solution Approach 1:
By combining multiple single sensitivity parameters into a global sensitivity parameter, the patent reduces the impact of individual measurement uncertainties. The mathematical combination process integrates multiple measurements, thereby improving the overall reliability of the sensitivity assessment while preserving the precision of individual measurements.
Data Source
AI summary
Disclosed is a hoist apparatus including: an electric motor, and a control box that can be electrically powered by a power supply, the control box including at least an electronic control circuit, an electrical wiring and an external casing forming a box of the control box, the external casing including at least sidewalls and a removable lid closing the box, the control box controlling the operations of the electric motor thanks to the electrical wiring connected to the electronic control circuit, to the power supply and to the electric motor, and a monitoring device, wherein the monitoring device is an insert of the box, the monitoring device being arranged within an enclosure, the enclosure being an added part of the box or being an exchanged part of the box and wherein the monitoring device is connected to the electrical wiring.