Variable-Focus Lens Array for Myopia Prevention in VR
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Solution Overview
Problem
The growing prevalence of myopia, particularly among young adults, is exacerbated by prolonged viewing of objects at a constant short distance, leading to eye fatigue and increased risk of near-sightedness, as existing solutions either disrupt the user's experience or only exercise the eye muscles without addressing myopia prevention during activities.
Innovation Solution
A variable perceived distance viewing system using a computer-implemented method with a variable-focus converging lens array that adjusts the focal distance and dynamically rescales images to maintain constant object size, allowing users to view content without noticing optical distance changes, thereby mitigating myopia development.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a constant focal length is used for prolonged viewing, then the user can view content clearly, but eye fatigue increases and myopia risk increases
Solution Approach 1:
The patent applies dynamics by making the focal length variable rather than constant. The system dynamically adjusts the focal length of the display system to vary between near and far focal points during viewing, preventing the eye strain associated with fixed focal length while maintaining clear viewing throughout the adjustment range.
Solution Approach 2:
The patent changes the optical parameter of focal length over time. By periodically varying the focal length between different values (near and far), the system prevents the cumulative eye fatigue that occurs with constant focal length viewing, while the magnification compensation ensures the perceived object size remains constant.
2Object-affected harmful factors
If the focal distance is varied to reduce eye fatigue, then myopia prevention is improved, but the object size perceived by the user changes
Solution Approach 1:
The patent employs feedback by monitoring the focal length adjustments and automatically compensating for size changes through magnification adjustment. When the focal length is varied to prevent myopia, the system detects the resulting size change and applies compensatory magnification to maintain constant perceived object size, creating a closed-loop control system.
Solution Approach 2:
The patent merges two optical functions into a single system: focal length variation for eye health and magnification adjustment for size compensation. By combining these functions, the system achieves both myopia prevention and constant object size perception simultaneously, rather than requiring separate systems.
3Adaptability or versatility
If existing eye exercise systems are used, then eye muscles are exercised, but the user's viewing activity is disrupted
Solution Approach 1:
The patent maintains continuity of useful action by integrating eye exercise into the normal viewing activity itself. Rather than requiring users to stop viewing and perform separate eye exercises, the system continuously varies the focal length during viewing, allowing users to exercise their eye muscles while maintaining their reading, gaming, or other viewing activities without interruption.
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 system effectively reduces eye fatigue and minimizes myopia development by varying the optical distance during prolonged viewing tasks, such as reading or gaming, without disrupting the user's experience, thus addressing the challenge of constant focal length contributing to myopia.
Implementation Method 1
The variable-focus converging lens array sets a focal distance to a first perceived distance whereby the image is perceived as being present at the first perceived distance
Implementation Method 2
variable-focus converging lens array
Data Source
AI summary
According to one embodiment, a computer-implemented method for using a variable perceived distance viewing system includes outputting, by a computer, an image to a display visible via a variable-focus converging lens array. The variable-focus converging lens array sets a focal distance to a first perceived distance whereby the image is perceived as being present at the first perceived distance. Furthermore, the computer-implemented method includes adjusting, by the computer, the variable-focus converging lens array for adjusting a focal distance to a second perceived distance and scaling, by the computer, the image on the display to compensate for the focal distance adjustment. The features in the image at the first perceived distance have substantially the same dimensions as the same features in the image at the second perceived distance.