Contact Lens Solution Using Phosphorylcholine Polymer
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Solution Overview
Problem
Current contact lens solutions lack a combination of hydrophilic substances and nutrients, which affects the wettability and comfort of contact lenses, leading to dryness and eyestrain during extended wear.
Innovation Solution
A solution containing 0.01-1.0 parts by weight of a polymer with phosphorylcholine groups, 0.01-1 part by weight of an inorganic salt, and 100 parts by weight of water, along with optional vitamins B, to enhance wettability and promote eye health, reducing dryness and eyestrain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If storage solution contains only inorganic salts and surfactants, then lens moisture is maintained, but wettability is insufficient and lens surfaces become dry during extended wear
Solution Approach 1:
The patent combines inorganic salts (sodium chloride, boric acid, sodium borate) with hydrophilic polymers (phosphorylcholine groups) and vitamins (B1, B2, B3, B6, B12) into a single integrated storage solution formulation. This merging allows the solution to simultaneously provide moisture retention, enhanced wettability, nutritional benefits for eye health, and antimicrobial properties, thereby preventing lens dryness during extended wear without compromising any single function.
2Ease of operation
If cleaning solution contains nutrients to boost eye health, then comfort level improves, but wettability enhancement is insufficient
Solution Approach 1:
The patent merges hydrophilic polymers with phosphorylcholine groups, inorganic salts, and vitamins into a unified solution formulation that serves dual purposes: enhancing wettability through the hydrophilic polymer while simultaneously providing nutritional benefits through the vitamin content. This integration ensures that the solution achieves both improved comfort level and adequate wettability enhancement.
3Object-affected harmful factors
If solution contains both hydrophilic substances and nutrients, then wettability and eye health are improved, but solution formulation complexity increases
Solution Approach 1:
The patent specifies precise concentration ranges for each component: hydrophilic polymer at 0.01-1.0 parts by weight, inorganic salts at 0.01-1 part by weight, and vitamins B1-B12 at 0.001-0.1 parts by weight each. By defining these specific parameter ranges, the patent transforms the complex multi-component formulation into a controlled system with optimized performance, balancing the benefits of multiple ingredients against formulation complexity.
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 solution effectively maintains lens moisture and comfort by incorporating a hydrophilic polymer and vitamins, outperforming existing solutions in preventing dryness and enhancing eye health during prolonged wear.
Implementation Method 1
The polymer has a number-average molecular weight of about 4,000 to about 1,000,000 daltons and has a structure of formula (I)... When n is a positive integer, m/n is greater than 1. By making the solution for treating contact lens include the hydrophilic polymer, the wettability of contact lens can be promoted such that surfaces of lens are not easy to become dry
Implementation Method 2
the wettability of contact lens can be promoted such that surfaces of lens are not easy to become dry
Data Source
AI summary
A solution for treating contact lens is provided. The solution includes about 0.01-1.0 parts by weight (pbw) of a polymer having phosphorylcholine groups, about 0.01-1 pbw of an inorganic salt, and about 100 pbw of water. The polymer has a number-average molecular weight of about 4,000 to about 1,000,000 daltons and has a structure of formula (I):wherein, in formula (I), m is a positive integer, n is zero or a positive integer, and R is C2-C12 alkyl group or C2-C12 hydroxyalkyl group. When n is a positive integer, m/n is greater than 1.