Convergence-Reducing Lens for Digital Eye Strain

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Solution Overview

Problem

Current spectacle lenses exacerbate digital eye strain and convergence issues due to increased gaze-convergence angles, leading to discomfort, fatigue, and migraines from prolonged use of digital devices, as they require excessive contraction of the medial rectus muscles.

Innovation Solution

Development of convergence-reducing lenses with a near-vision region having a refractive power different from the distance-vision region, while maintaining matching optical powers, to reduce gaze-convergence angles and alleviate muscle strain, designed to refract light rays in a way that minimizes the rotation of the eyes when focusing on near objects.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional spectacle lenses are used for near-vision correction, then near-vision clarity is improved, but gaze-convergence angle increases causing eye strain and muscle fatigue

Engineering Contradiction:

Improvenear-vision clarityVSAvoideye strain and muscle fatigue

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The lens implements different optical properties in different regions: the distance-vision region has standard refractive power while the near-vision region has reduced refractive power. This local differentiation allows clear near-vision without excessive convergence, resolving the contradiction between vision clarity and eye strain reduction

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent changes the optical parameter (refractive power) of the near-vision region compared to conventional lenses. By reducing the refractive power in the near-vision region while maintaining it in the distance region, the lens decreases gaze-convergence angle and thereby reduces eye strain and muscle fatigue

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If bifocals or PALs are used to provide different optical corrections for near and distance vision, then vision correction versatility is improved, but abrupt transitions or visible lines cause visual discomfort

Engineering Contradiction:

Improvevision correction for multiple distancesVSAvoidvisual discomfort from transitions

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The lens provides different optical corrections in different regions (distance-vision region with standard power, near-vision region with reduced power) without creating abrupt transitions. This localized approach maintains visual comfort while delivering versatile correction for multiple viewing distances

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

Instead of adding positive power for near-vision as in conventional bifocals and PALs, this invention reduces the refractive power in the near-vision region. This inverted approach achieves near-vision correction while avoiding the visual discomfort associated with traditional multi-focal lens transitions

Inventive Principle:

Principle #13The other way round (Inversion)

3Productivity

If digital device usage time increases, then productivity and communication efficiency are improved, but eye strain and convergence issues worsen

Engineering Contradiction:

Improvedigital work efficiencyVSAvoideye strain and convergence issues

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The lens acts as an intermediary device between the user and digital screens. By modifying the optical path through its specialized near-vision region with reduced refractive power, it reduces gaze-convergence angle during digital device usage, thereby preventing eye strain and convergence issues while maintaining productivity

Inventive Principle:

Principle #24Intermediary (Mediator)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The convergence-reducing lenses effectively reduce eye strain, digital migraines, and related discomforts by minimizing the gaze-convergence angle, thereby alleviating muscle strain and improving comfort during prolonged use of digital devices.

Implementation Method 1

configured to refract a light ray, directed by a source at a distance-vision region point to propagate to an image point; and a near-vision region configured to refract a light ray, directed by the source at a near-vision region point to propagate to the same image point

Methodology Applied

Scientific EffectRefraction: Refraction

Data Source

PatentUS10048511B2Eye-strain reducing lens

Publication Date: 2018.08.14 NEWTON INC

AI summary

An eye-strain reducing lens is characterized by an x-y-z coordinate system, and includes a distance-vision region, baying a non-negative distance-vision optical power, configured to refract a light ray, directed by a source at a distance-vision region point at a distance-vision x-distance from a center of the coordinate system, to propagate to an eye-center-representative location; and a near-vision region, having a near-vision optical power that matches the distance-vision optical point within 0.5 D, configured to refract a light ray, directed by the source at a near-vision region point at a near-vision x-distance from the center of the coordinate system, to propagate to the same eye-center representative location; wherein the near-vision x-distance is smaller than the distance -vision x-distance.