Progressive Lens Vision Zone Marking for Faster Patient Adaptation
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Solution Overview
Problem
Patients experience adaptation difficulties with progressive addition lenses due to the lack of understanding of the lens design and how to gaze through the various vision zones optimally, leading to discomfort and complaints.
Innovation Solution
A method for visualizing different vision zones on ophthalmic lenses by applying personalized optical design profiles, including permanent or temporary markings, such as engraving, printing, or using adhesive stickers, to clearly indicate far and near vision zones, helping patients understand how to use their glasses effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If progressive addition lenses are designed with smooth power progression from distance to near zones, then the lens provides continuous vision across all focus distances, but the varying curvature creates surface astigmatism that causes blur, distortion, and swim effects
Solution Approach 1:
The lens is divided into distinct functional zones (distance vision zone, intermediate zone, near vision zone) with different optical characteristics. Each zone is optimized independently to provide appropriate vision correction while minimizing astigmatism in each specific region, rather than attempting uniform correction across the entire lens surface.
Solution Approach 2:
Different regions of the lens are assigned different optical properties and curvatures tailored to their specific function. The distance portion has different curvature characteristics than the near portion, with each region's astigmatism optimized for its intended viewing distance, accepting that astigmatism varies locally across the lens surface.
2Shape
If the power gradient at the nasal side is made steeper to accommodate inset requirements, then the lens fits better in the frame, but the distortion and swim effect increase for the wearer
Solution Approach 1:
The nasal and temporal sides of the lens are designed with different power gradient characteristics. The nasal side accommodates the inset requirement with a steeper gradient, while the temporal side uses a shallower gradient to minimize distortion. Each side's optical properties are locally optimized for its specific functional requirements.
3Loss of information
If optical mappers are provided to patients before wearing glasses to show the optical profile, then the lens design can be explained, but the exposure time is too brief to help patients adapt to the new lens
Solution Approach 1:
Patients are provided with visual representations of their specific lens design and given instructions on optimal gazing techniques before receiving the glasses. This preliminary education allows them to understand the lens characteristics and practice appropriate viewing methods in advance, reducing adaptation time once the glasses are fitted.
Solution Approach 2:
Visual copies or representations of the patient's specific optical profile are created and provided to them. These copies allow patients to study and understand their unique lens design characteristics without requiring extended exposure to the actual glasses, enabling informed understanding while minimizing time loss.
4Adaptability or versatility
If multiple optical designs are proposed to patients to allow choice, then customer satisfaction can be improved, but the complexity of explaining and comparing the designs increases
Solution Approach 1:
Different optical designs are represented using distinct visual characteristics such as color coding, patterns, or graphical representations. This allows patients to easily distinguish between multiple design options and understand their differences at a glance, simplifying the comparison process while maintaining design versatility.
Solution Approach 2:
Visual representations or models of different optical designs are provided to patients, allowing them to see and compare the characteristics of each design option before making a selection. These copies make the abstract optical concepts concrete and easier to understand, reducing the complexity of the decision-making process.
Data Source
AI summary
The present disclosure relates to a method for visualizing different vision zones on an ophthalmic lens. The method comprises receiving a calculated optical design profile being indicative of a specific patient's correction; creating a physical representation data of the optical design profile corresponding to a personalized optical design profile; wherein the optical design profile is configured and operable to enable design profile visualization and to identify main vision zones including far and near vision zones. There is also provided an ophthalmic device comprising a lens having a front and a back surface and a personalized optical design profile being applied onto at least one front or a back surface, wherein the personalized optical design profile is configured and operable to enable design profile visualization and to identify main vision zones including far and near vision zones.