Objective Refraction Device for Reducing Eyeglass Image Distortion
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Solution Overview
Problem
Conventional methods for determining refractive corrections for eyeglasses rely heavily on subjective feedback and the experience of optometrists, leading to inconsistent results and image distortion issues, which can cause adaptation difficulties and abandonment of eyeglasses.
Innovation Solution
An objective refraction device measures refractive errors objectively, generating multiple prescriptions optimized for image quality and reduced magnification differences, with a phoropter module controlling cylindrical lenses based on these prescriptions to minimize subjective feedback reliance and standardize the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional subjective refraction methods are used relying on optometrist experience, then the refraction process can be performed with simple equipment, but the results are inconsistent and cause image distortion leading to consumer adaptation difficulties
Solution Approach 1:
The refraction process is segmented into multiple independent objective measurements (spherical power, cylindrical power, cylindrical angle) performed by automated refraction devices. Each parameter is measured separately and objectively, then integrated to form the complete prescription, eliminating reliance on individual optometrist experience while maintaining processability
Solution Approach 2:
The subjective mechanical assessment process is replaced with automated optical measurement systems that objectively determine refractive parameters. The system substitutes human judgment with instrument-based measurement, achieving consistent and precise results without requiring complex subjective evaluation procedures
2Adaptability or versatility
If multiple objective prescriptions are generated with different optimizations, then consumer choice and adaptation are improved, but the prescription determination process becomes more complex
Solution Approach 1:
Multiple prescriptions are generated by systematically varying key parameters (spherical power, cylindrical power, cylindrical angle) around the optimal objective measurement values. Each prescription represents a different parameter configuration optimized for specific conditions, providing consumer choice while using standardized parameter adjustment rules rather than complex decision processes
Solution Approach 2:
The system performs preliminary objective measurements and generates multiple candidate prescriptions before the consumer makes a selection. This preliminary action establishes a foundation of scientifically determined options, reducing the complexity of the final decision process by pre-calculating viable prescriptions with different optimization characteristics
Data Source
AI summary
Methods, devices, and systems are disclosed for determining refractive corrections of human eyes to reduce and eliminate image distortion associated with eyeglasses. In some embodiments, an objective refraction module is configured to measure refractive errors of an eye objectively, without subjective feedback from a tested subject. A computation module is configured to generate a plurality of objective prescriptions. A phoropter module is configured to perform a subjective refraction for determining a plurality of subjective spherical powers based on the plurality of objective prescriptions. An output module is configured to generate a plurality of prescriptions for eyeglasses, the plurality of prescriptions comprising (a) a first prescription having a first subjective spherical power fs1, a first objective cylinder power Fc1, and a first objective cylinder angle Fa1, and (b) a second prescription having a second subjective spherical power fs2, a second objective cylinder power Fc2, and a second objective cylinder angle Fa2.