Modular Adapters for Smartphone Ophthalmoscopy
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Solution Overview
Problem
Current digital ophthalmoscopy devices are often large, expensive, and limited to clinical settings, making it difficult to capture high-quality eye images in remote or non-clinical environments.
Innovation Solution
A modular adapter system comprising an anterior adapter with a variable-intensity light source and a movable macro lens, and a posterior adapter with a telescoping arm, designed to removably engage with handheld computer devices like smartphones, enabling flexible and cost-effective ophthalmoscopy imaging of both anterior and posterior segments of the eye.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional digital fundus cameras are used, then image quality is improved, but device size and cost increase
Solution Approach 1:
The system divides the ophthalmoscopy function into separate components: a smartphone camera for image capture, removable lens adapters for different eye segments (anterior and posterior), and optional lighting accessories. This segmentation allows high-quality imaging without requiring a complete dedicated camera system, reducing overall device size and cost while maintaining image quality.
Solution Approach 2:
The smartphone serves multiple functions: it acts as the camera, processor, display, and communication device. The lens adapters are designed to be universal, working with different smartphone models and both anterior and posterior segment imaging. This multi-functionality eliminates the need for separate dedicated devices, reducing complexity while preserving measurement precision.
2Measurement precision
If traditional digital fundus cameras are used, then image quality is improved, but device cost increases
Solution Approach 1:
The system leverages the smartphone's existing capabilities (camera, processor, display, connectivity) to perform ophthalmoscopy functions. By utilizing the device the patient or provider already possesses, the system eliminates the need to manufacture and distribute expensive dedicated imaging devices, significantly reducing cost while maintaining image quality through proper optical adapter design.
Solution Approach 2:
The lens adapters are designed as relatively simple, inexpensive components that can be manufactured at low cost using standard optical materials and machining. These adapters can be easily produced and distributed without requiring complex assembly or calibration infrastructure, making high-quality ophthalmoscopy accessible in remote and resource-limited settings.
3Measurement precision
If traditional ophthalmoscopy devices are used, then imaging capability is improved, but portability deteriorates
Solution Approach 1:
The system merges the ophthalmoscopy optical components with the universally carried smartphone. The lens adapters attach directly to the smartphone camera, combining the imaging function with a device that is already portable and always with the user. This eliminates the need to carry separate heavy imaging equipment while maintaining professional-grade imaging capability.
Solution Approach 2:
The adapter system is designed to be dynamically configurable - lenses and lighting can be attached or removed based on the specific imaging needs (anterior vs. posterior segment). This dynamic adaptability allows the system to maintain minimal weight for portability while providing full imaging capability when needed, resolving the contradiction between portability and imaging capability.
4Adaptability or versatility
If specialized ophthalmoscopy equipment is used, then imaging versatility is improved, but device complexity increases
Solution Approach 1:
The system segments the imaging versatility into modular components - different lens adapters for anterior segment, posterior segment, and macular imaging, plus optional lighting accessories. Each component is simple in design but provides specific functionality. When combined with the smartphone, these simple modules achieve comprehensive imaging versatility without requiring a single complex integrated device.
Solution Approach 2:
The smartphone platform provides universal functionality for all imaging tasks - capturing images, processing data, storing records, and enabling telemedicine communication. The lens adapters are designed with universal mounting mechanisms that work across different smartphone models. This universality achieves imaging versatility through simple, interchangeable components rather than complex specialized equipment.
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 modular adapter system allows for portable, low-cost, and versatile ophthalmoscopy imaging, enabling eye care providers to capture high-quality images anywhere, including remote locations, without the need for expensive equipment, and is adaptable to various handheld devices.
Implementation Method 1
The anterior adapter includes a variable-intensity light source and a movable macro lens configured to move the macro lens from a first position in coaxial alignment with an optical axis of the hand held computer device camera
Implementation Method 2
a movable macro lens configured to move the macro lens from a first position in coaxial alignment with an optical axis of the hand held computer device camera to a second position outside of the optical axis of the camera, the macro lens configured to image an anterior portion of an eye
Implementation Method 3
a telescoping arm with a first end and a second end, the first end configured to removably engage with the mount and the second end configured to contact the lens mount
Implementation Method 4
The variable intensity light source can include a light emitting diode (LED)
Data Source
AI summary
Modular lens adapter system are provided for use with a hand held computer device having a camera for mobile ophthalmoscopy. The modular lens adapter systems include an anterior adapter and a posterior adapter configured to removably engage with a hand held computer device. The anterior adapter can include a variable intensity light source, a clamp, and a movable macro lens. The posterior adapter can include a hand held computer device mount, a lens mount, and a telescoping arm with a first end and a second end with the first end configured to removably engage with the mount and the second end configured to contact the lens mount. Methods are also provided for using the systems to obtain an image of an anterior portion of the patient's eye and a posterior portion of the patient's eye.