Variable Optic Insert with Liquid Crystal Layers
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Solution Overview
Problem
Conventional ophthalmic lenses, such as contact and intraocular lenses, have static optical qualities that cannot be easily changed by the wearer, limiting their ability to accommodate varying vision correction needs without significant effort or the use of additional lenses.
Innovation Solution
Incorporation of a variable optic insert with liquid crystal elements that can be energized and integrated into ophthalmic devices, allowing for dynamic changes in optical quality through the use of gradient-indexed patterns and electrically controlled refractive indices, enabling adjustable focal characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional ophthalmic lenses with static optical qualities are used, then manufacturing simplicity is maintained, but adaptability and ease of operation deteriorate due to inability to change optical characteristics
Solution Approach 1:
The patent applies the dynamics principle by incorporating a liquid crystal layer that can dynamically change its optical properties in response to applied voltage. The liquid crystal molecules reorient themselves when voltage is applied, changing the refractive index and thus the focal length of the lens, enabling the lens to adapt between different optical states rather than remaining static.
Solution Approach 2:
The patent applies parameter changes by modifying the refractive index of the liquid crystal layer through voltage control. By changing the electrical parameter (voltage), the optical parameter (refractive index) is changed, which in turn changes the focal length of the lens, allowing the same lens to provide different vision correction powers.
2Adaptability or versatility
If multiple lenses are used to accommodate varying vision needs, then adaptability is improved, but device complexity and ease of operation worsen due to the need to handle and switch between multiple lenses
Solution Approach 1:
The patent applies universality by designing a single lens that can perform multiple functions - providing different vision correction powers (distance, intermediate, near vision) through electrical control of the liquid crystal layer. This multi-functional lens replaces the need for multiple separate lenses, making the device more versatile while easier to operate.
Solution Approach 2:
The dynamic switching capability of the liquid crystal layer allows the lens to transition between different optical states on demand, enabling the user to switch between different vision correction modes simply by applying voltage, eliminating the need to physically handle and switch between multiple lenses.
3Adaptability or versatility
If liquid crystal elements are incorporated into ophthalmic lenses, then adaptability and optical quality are improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies the nested doll principle by integrating the liquid crystal layer within the lens structure, embedding it between transparent electrodes and alignment layers that are themselves integrated into the lens. This nested configuration allows the complex liquid crystal components to be contained within the overall lens assembly, facilitating a unified manufacturing process rather than requiring separate assembly of multiple components.
Solution Approach 2:
The patent applies composite materials by combining the liquid crystal layer with transparent electrodes, alignment layers, and lens materials to create a integrated variable optic insert. This composite structure allows all components to be manufactured together as a single unit, reducing manufacturing complexity despite the advanced functionality provided by the liquid crystal elements.
4Manufacturing precision
If gradient-indexed patterns are used in liquid crystal layers, then optical quality and focal characteristics are improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies local quality by creating spatial variations in the liquid crystal orientation through patterned alignment layers. Different regions of the liquid crystal layer are oriented differently to create specific refractive index distributions, enabling the formation of gradient-index optical zones that provide different focal powers in different regions of the lens.
Solution Approach 2:
The patent replaces mechanical lens design (physical shaping of glass or plastic) with an electrically controlled liquid crystal system. The gradient-index patterns are achieved not by mechanical machining but by controlling the molecular orientation of liquid crystals through electric fields and alignment layers, allowing for more flexible and precise optical zone creation.
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
Enables wearers to dynamically adjust the optical properties of ophthalmic lenses, providing flexible vision correction and accommodating varying focal needs without the need for multiple lenses, enhancing user convenience and adaptability.
Implementation Method 1
the liquid crystal layer varies its index of refraction in response to an applied voltage
Implementation Method 2
The reactive monomer mixture is exposed to actinic radiation to form an ophthalmic lens
Data Source
AI summary
This invention discloses methods and apparatus for providing a variable optic insert into an ophthalmic lens. The variable optic insert may have surfaces within that have differing radii of curvature. A liquid crystal layer may be used to provide a variable optic function and in some embodiments, an alignment layer for the liquid crystal layer may be patterned in a radially dependent manner. The patterning may allow for the index of refraction of the optic device to vary in a gradient-indexed or GRIN manner. An energy source is capable of powering the variable optic insert included within the ophthalmic lens. In some embodiments, an ophthalmic lens is cast-molded from a silicone hydrogel. The various ophthalmic lens entities may include electroactive liquid crystal layers to electrically control optical characteristics.