Handheld Ophthalmic Device for Superimposed Pupil Examination
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Solution Overview
Problem
Current ophthalmic devices do not allow simultaneous viewing of both pupils in a superimposed image, making it difficult to detect afferent pupillary defects, especially in subjects with small or dark pupils, and do not facilitate easy examination of ocular surfaces and surrounding tissues under high magnification.
Innovation Solution
A portable hand-held ophthalmic device with high plus lenses and fixed LED and blue/UV lights that enables simultaneous and superimposed viewing of both pupils, allowing for quick and magnified examination of the ocular surface and surrounding tissues, and the ability to shine light on each pupil independently for observing pupillary reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a penlight is used for pupillary examination, then the device is simple and portable, but the examiner cannot simultaneously view both pupils in a superimposed image
Solution Approach 1:
The device merges two separate penlights into a single unit with a dual light source, allowing simultaneous illumination of both pupils. The observer can view both pupils through a single ophthalmic lens system, creating a superimposed image that enables direct comparison of pupillary responses without requiring the examiner to switch between eyes or use multiple separate light sources.
Solution Approach 2:
The invention transitions from a one-dimensional examination approach (examining one pupil at a time with a single penlight) to a two-dimensional simultaneous view of both pupils through the ophthalmic lens system. This dimensional change allows the examiner to perceive both pupils in the same visual field, improving the detection of afferent pupillary defects by enabling direct visual comparison.
2Weight of moving object
If a penlight is used for pupillary examination, then the device is portable, but the examiner cannot view both pupils under high magnification simultaneously
Solution Approach 1:
The device combines portability with high magnification capability by integrating a portable housing with high-power ophthalmic lenses. The observer can wear the device on their finger or hold it handily, maintaining the portability advantage while the high plus lenses provide the necessary magnification to view both pupils simultaneously with greater detail and precision.
3Device complexity
If a penlight is used for pupillary examination, then the device is simple, but the examiner cannot easily examine ocular surfaces and surrounding tissues under high magnification
Solution Approach 1:
The device is designed to perform multiple functions: it can examine pupils, ocular surfaces, and surrounding tissues using the same portable housing and ophthalmic lens system. The high plus lenses provide high magnification for detailed examination of any ocular structure, while the dual light sources can be positioned to illuminate different anatomical regions, making the device a universal tool for comprehensive eye examination.
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
Enhances the detection of afferent pupillary defects and allows for accurate examination of ocular structures, improving diagnostic capabilities in clinical settings, including urgent care and military applications, by providing a magnified and portable means to assess pupil reactions and ocular surfaces.
Implementation Method 1
containing high plus lenses and fixed LED and blue/UV lights
Implementation Method 2
fixed LED and blue/UV lights with easy controls for shining the light directly into each eye
Implementation Method 3
The device is equipped with blue/UV LED lights that produce fluorescence with the additional instillation of fluorescein dye into the eye
Data Source
AI summary
A new device, called Afferent Pupil Tester, designed for close up and magnified examination of both pupils at the same time, superimposed, as they react to direct and consensual light, comprises of high plus lenses, measuring grid, bright LED lights controlled with momentary switches, UV lights controlled by momentary switches, batteries, built-in camera and/or external camera, detachable facemask, and a sturdy casing.