Periscopic Device for Squinting Eye Examination
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Solution Overview
Problem
Examination of inwardly squinting individuals, particularly children and mentally disabled persons, is challenging due to difficulty in maintaining focus and the obstruction of the line of sight during eye examinations, often requiring general anesthesia, which complicates the process and may result in side effects.
Innovation Solution
A periscopic device with a base out prism and mirrors that deflects the line of sight of the inwardly squinting eye by approximately 90 degrees, allowing the person to focus on an object while the other eye is examined, thereby facilitating the examination process without obstructing the line of sight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the examining person or instrument is positioned close to the patient's face to examine the eye, then the examination can be performed, but the line of sight of the focusing eye is blocked
Solution Approach 1:
The periscopic device introduces a spatial dimension change by using mirrors to redirect the line of sight at approximately 90 degrees, allowing the examining person to be positioned laterally rather than directly in front of the patient's face, thus eliminating the obstruction problem
2Stability of the object's composition
If the child is allowed to watch a film or toy to maintain focus during examination, then the eye can be kept still, but the squinting eye blocks the line of sight to the film
Solution Approach 1:
The periscopic device enables the child to view the film through a redirected optical path, positioning the film laterally where it is not blocked by the squinting eye, while maintaining the child's focus and eye stability during examination
3Stability of the object's composition
If general anesthesia is used to keep the patient still during examination, then the examination can be completed, but the process becomes more complicated and side effects occur
Solution Approach 1:
The periscopic device acts as an intermediary optical system that allows the patient to maintain natural focus on distant objects while being examined, eliminating the need for general anesthesia and its associated complications and side effects
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 periscopic device enables efficient eye examination by maintaining the person's focus and keeping the head still, reducing the need for general anesthesia and improving examination efficiency for inwardly squinting individuals.
Implementation Method 1
the first and the second mirrors are each arranged so that when the person looks through the periscopic device with the inwardly squinting eye while the other eye is being examined, the first and the second mirrors each deflects the line of sight of the person by an angle of approximately 90°
Implementation Method 2
a base out prism arranged in front of the first mirror so that, during use of the periscopic device, the line of sight of the inwardly squinting eye is deflected towards the first mirror
Data Source
AI summary
Disclosed is a periscopic device for examining an eye of a person with an inwardly squinting eye (esotropia). The periscopic device includes a tube with two mirrors arranged at opposite ends of the tube. The mirrors are arranged so that when the person looks through the periscopic device with the inwardly squinting eye, the two mirrors deflect the line of sight of the person toward an object reflected in the second mirror. To account for the squint of the eye, either a base out prism can be used to deflect the line of sight toward the first mirror, or the two mirrors can be arranged non-parallel to each other. With the inwardly squinting eye focused on the reflected object, the other eye can be examined. Methods of using the periscopic device are also disclosed.