Multifocal Intraocular Lens Zoning to Minimize Glare and Halos

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Solution Overview

Problem

Existing intraocular lenses suffer from issues such as glares and halos due to diffractive structures, and inadequate light transmission, while failing to provide clear vision for near, intermediate, and distance vision without the need for additional corrective lenses.

Innovation Solution

A multifocal intraocular lens with three zones on its anterior side, each optimized for distance, intermediate, and near vision, and designed with a specific curvature and curvature, incorporating a transition zone that enhances the efficacy of the lens, which includes a first arm and a second arm, each optimized for specific applications.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If diffractive structures are used in intraocular lens, then multiple focal lengths are achieved, but glares and halos occur and light transmission is reduced

Engineering Contradiction:

Improvemultiple focal lengthsVSAvoidglares and halos

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The lens is divided into multiple distinct zones: a central optical zone with diffractive structure for distance vision, an intermediate zone with gradient refractive index for intermediate vision, and a peripheral zone for near vision. This segmentation allows each zone to contribute to different focal lengths without the negative effects of diffractive structures affecting the entire lens surface.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the lens are assigned different optical properties: the central zone has diffractive microstructures optimized for distance vision, the intermediate zone has a gradient refractive index for intermediate focusing, and the peripheral zone provides near vision correction. This local differentiation enables multiple focal lengths while minimizing glare and halo effects in each specific region.

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If diffractive structures are used in intraocular lens, then multiple focal lengths are achieved, but light transmission is reduced

Engineering Contradiction:

Improvemultiple focal lengthsVSAvoidlight transmission

Core Design Contradiction:

Adaptability or versatilityVSLoss of energy

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The refractive index is varied continuously through the intermediate zone to create a gradient that optimizes light transmission and focusing. This parameter change allows the lens to achieve intermediate focal lengths without the light-blocking diffractive structures, thereby maintaining higher overall light transmission while still providing multiple focal points.

Inventive Principle:

Principle #35Parameter changes

3Loss of energy

If single focal length lens is used, then light transmission is maximized, but clear vision for near, intermediate, and distance cannot be achieved

Engineering Contradiction:

Improvelight transmissionVSAvoidvision clarity for multiple distances

Core Design Contradiction:

Loss of energyVSAdaptability or versatility

Solution Approach 1:

The intraocular lens is designed to perform multiple functions within a single device: the central zone provides distance vision correction, the intermediate zone provides intermediate vision correction, and the peripheral zone provides near vision correction. This multi-functionality allows the lens to replace multiple separate corrective lenses while maintaining high light transmission through its transparent materials.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The lens utilizes the radial dimension to create different optical zones at different distances from the center. By varying the optical properties in the radial direction (central, intermediate, peripheral zones), the lens achieves multiple focal lengths without compromising light transmission, as the transparent materials allow light to pass through all zones efficiently.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 multifocal intraocular lens with three zones, each optimized for distance, intermediate, and near vision, provides clear vision across varying pupil sizes by minimizing glare and halos, and ensuring adequate light transmission.

Implementation Method 1

An anterior side of the optic includes a plurality of zones for imparting clarity for distance, intermediate and near vision

Methodology Applied

Scientific EffectRefraction: Refraction

Implementation Method 2

The first, the second and the third zone have a transition zone ranging between 3.75°-5°

Methodology Applied

Scientific EffectOptical aberration reduction:

Data Source

PatentUS20250387220A1Multifocal intraocular lens

Publication Date: 2025.12.25 BHALE VIKRANT

AI summary

The multifocal intraocular lens 100 includes a first arm 105, a second arm 110 and an optic 115. The lens 100 is positioned on the pupil 120 instead of the cataractous natural lens of the eye. The optic 115 of the lens 100 has three different zones, each zone is defined with different degrees as per the user's requirement. The first zone 125 provide distance vision, the second zone 130 provides intermediate vision and the third zone 135 provides near vision. The zones defined on the optic 115 are adaptable to contraction and expansion of the pupil 120 and provide clear vision in both said states of the pupil 120.