Objective Eye Accommodation Assessment With Real-World Targets
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Solution Overview
Problem
Existing methods for objectively assessing accommodation in the eye are subjective, prone to bias, difficult to set up, and require extensive post-processing, while optically induced stimuli can be challenging for patients, leading to inaccurate measurements.
Innovation Solution
A system comprising a near display, a far display, beam splitters, a refractor device, and a controller that automatically presents real-world targets at varying distances, captures refractive states, and calculates accommodative response using a calibration factor, ensuring accurate and objective assessment without complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If subjective techniques such as standard push-up tests are used to measure accommodative ability, then the measurement process is simple and quick, but the results are prone to patient and clinician bias and often overestimate the patient's accommodative ability
Solution Approach 1:
The patent replaces subjective mechanical assessment methods with an objective optical measurement system using a refractor device to measure refractive states. This substitution eliminates human bias while maintaining clinical feasibility, as the system automatically captures and analyzes refractive data without requiring patient or clinician interpretation.
Solution Approach 2:
The patent introduces a refractor device as an intermediary between the patient's eye and the measurement process. This intermediary objectively measures refractive states during accommodation tasks, providing accurate data without direct patient-clinician interaction that introduces bias.
2Measurement precision
If optically induced accommodative stimuli are used to measure accommodation, then the measurement process is objective, but the stimuli are difficult for patients to focus on and may underestimate a patient's accommodative ability
Solution Approach 1:
The patent changes the parameters of the accommodative stimulus by using real-world targets at various distances instead of traditional optically induced stimuli. This modification makes the targets more familiar and easier for patients to focus on, thereby obtaining more accurate accommodative measurements without compromising objectivity.
Solution Approach 2:
Instead of using artificial optical stimuli that patients find difficult to focus on, the patent inverts the approach by using natural real-world targets that patients are accustomed to viewing. This inversion maintains objective measurement while significantly improving patient comfort and engagement.
3Measurement precision
If existing objective measurement systems are implemented, then accommodation can be measured objectively, but the systems are difficult to set up and require a large amount of post-processing to obtain useful results
Solution Approach 1:
The patent implements a self-service measurement system where the refractor device automatically captures refractive states, the controller automatically processes the data, and the system generates accommodative response results without requiring extensive manual post-processing. This automation maintains measurement accuracy while dramatically reducing operational complexity.
Solution Approach 2:
The patent performs preliminary calibration and setup procedures that establish the measurement system's parameters in advance. This preliminary action ensures that once the system is set up, it can automatically and accurately measure accommodation without requiring complex real-time adjustments or extensive post-processing during actual measurements.
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
Provides an accurate, objective, and clinically feasible method for assessing accommodation, reducing bias and complexity, and presenting patient-friendly targets, enabling reliable accommodative ability measurement.
Implementation Method 1
The near display can be configured to project the stimulus target onto the first beam splitter
Implementation Method 2
The refractor device can comprise a refractor light source configured to generate an illumination beam and a refractor camera configured to capture or detect light reflected by the eye in response to the illumination beam
Data Source
AI summary
Disclosed are apparatus, systems, and methods for objectively assessing accommodation in an eye. For example, a method for objectively assessing accommodation can comprise displaying, at a far display, a stimulus target for a first duration and displaying, at a near display, the stimulus target for a second duration. The stimulus target displayed at the near display can be projected onto a first beam splitter positioned at an oblique angle with respect to the near display. The stimulus target displayed on the far display can be axially aligned with the stimulus target projected onto the first beam splitter. The method can also comprise obtaining, at a controller, measurements concerning refractive states of the eye during the first duration and the second duration from a refractor device in communication with the controller and determining, using the controller, an accommodative response of the eye based in part on the respective refractive states.