Head Movement Training System for Progressive Lenses
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Solution Overview
Problem
Adapting head movement behavior to progressive spectacles is challenging for spectacle wearers, as they do not receive clear feedback on improving visual clarity, leading to inadequate head movement adjustments and potential blurred vision.
Innovation Solution
A system and method that generate visual stimuli, capture and assess head movements, providing feedback information to help users learn and adapt their head movement behavior, utilizing a visual stimulus generation device, measurement device, and assessment device to offer relative assessments such as 'good' or 'excellent' based on comparisons with predetermined movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a person wears progressive spectacles, then the visual impression becomes clear when head movements are properly adapted, but the spectacle wearer receives no clear feedback on how to improve head movement behavior, leading to blurred visual impression
Solution Approach 1:
The system provides visual feedback by displaying a reference head movement trajectory and comparing it with the user's actual head movement. The feedback includes deviation indicators that show how much the user's head movement differs from the optimal trajectory, enabling the user to learn and adapt their head movement behavior to achieve clearer visual impression through progressive lenses
2Measurement precision
If the spectacle wearer changes head movement behavior to adapt to progressive spectacles, then visual clarity improves, but the user does not notice that inadequate head movement is the cause of blurred visual impression
Solution Approach 1:
The system displays visual feedback showing the optimal head movement trajectory and compares it with the user's actual movement. This feedback mechanism makes the invisible cause of blurred vision (inadequate head movement) visible and understandable, guiding the user on how to adjust their head movement behavior to improve visual clarity
Solution Approach 2:
The system introduces an intermediary feedback display that mediates between the user's natural head movement and the optimal movement pattern. The feedback interface acts as a teacher, showing the user what movement pattern would produce clear vision through the progressive lenses, making the adaptation process learnable
3Ease of operation
If visual feedback is provided to guide head movement adaptation, then head movement behavior can be improved, but the system complexity increases
Solution Approach 1:
The system uses a camera that can serve multiple functions: capturing the user's head movement, tracking facial features, and providing visual feedback. The display device also serves dual purposes by showing both the visual stimulus and the head movement feedback trajectory. This multi-functionality reduces the need for separate specialized components, thereby reducing overall system complexity
Data Source
AI summary
The invention relates to a system and to a method for training head movements of a person. Visual stimuli are generated with a visual stimulus generation device for a left and/or right eye of the person. Head movements of the person are captured with a measurement device. The head movement of the person captured with respect to a generated visual stimulus is assessed in a computational unit. Assessment information that is dependent on the assessment of the head movement captured with respect to a generated visual stimulus is then provided for the person with an output device.