Ophthalmic Lens Filters Tuned to Dynamic Eye Sensitivity
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Solution Overview
Problem
Existing methods for determining ophthalmic filters are subjective and do not optimize filter characteristics based on the dynamic sensitivity of the wearer's eyes to variations in light flux, leading to compromises between visual performance and comfort in different light environments.
Innovation Solution
A method to objectively or subjectively determine the dynamic sensitivity of the wearer's eyes to variations in light flux, allowing for personalized filter configuration to optimize visual performance and comfort by considering the wearer's ability to adapt to changes in luminous flux, using a combination of physiological, physical, and subjective measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If subjective tests by trying on different ophthalmic lenses are used to determine filters, then the wearer can experience visual comfort firsthand, but the filter characteristics cannot be optimized objectively
Solution Approach 1:
The patent replaces subjective mechanical testing with objective physiological measurements. Specifically, it uses pupillometry (measuring pupil diameter variations) and photostress recovery time measurements to objectively determine the wearer's dynamic sensitivity to luminous flux variations, thereby determining optimal filter characteristics without relying on subjective wearer feedback.
2Reliability
If existing objective methods are used to determine filters, then color vision can be improved, but dynamic sensitivity to luminous flux variations cannot be taken into account
Solution Approach 1:
The patent introduces dynamic measurements to assess the wearer's adaptability to light variations. It measures pupillary response dynamics (pupil diameter changes over time) and photostress recovery time (time to regain visual sensitivity after exposure to bright light), thereby capturing the dynamic sensitivity of the visual system to luminous flux variations, which static color vision tests cannot detect.
3Manufacturing precision
If filters are determined based on static light conditions, then visual performance can be optimized for specific environments, but adaptability to dynamic light environments is compromised
Solution Approach 1:
The patent uses feedback from physiological measurements (pupillary response and photostress recovery) to determine filter characteristics. The measured dynamic sensitivity of the wearer's visual system provides feedback that guides the selection and configuration of filters, ensuring they are optimized for the wearer's specific adaptive capabilities rather than generic static conditions.
Data Source
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AI summary
The invention relates to a method for determining a filter for an ophthalmic lens intended for being placed in front of the eye of a wearer, said filter being capable of improving or maintaining the visual comfort and/or the visual performance of said wearer. According to the invention, this method includes: a) a step of determining a quantity representing a dynamic sensitivity of the eye or the two eyes of the wearer to a variation in a luminous flux; and b) a step of determining at least one optical feature of said filter as a function of the determined representative quantity.