Ophthalmic Apparatus Merging Refractive Mapping and Diaphanoscopic Imaging
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Solution Overview
Problem
Conventional ophthalmic apparatuses face difficulties in accurately checking and locating opacity in the crystalline lens or other factors that influence eye refractive power distribution and wavefront aberration measurements.
Innovation Solution
An ophthalmic apparatus is designed with a measurement optical system, an illumination for the anterior segment, a first image-pickup system for the anterior segment, a projection optical system for a diaphanoscopic image, and a control part that displays both the mapping image and diaphanoscopic image on a single monitor, allowing for easier identification of opacity and improved evaluation of refractive power distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If only mapping image is displayed to measure eye refractive power distribution, then measurement function is achieved, but ability to check opacity of crystalline lens is insufficient
Solution Approach 1:
The patent combines the mapping image display function with the diaphanoscopic image display function into a single integrated system. The control part simultaneously processes and displays both types of images on the same monitor, allowing clinicians to view refractive power distribution and lens opacity together without requiring separate devices or sequential operations.
Solution Approach 2:
The ophthalmic apparatus is designed to perform multiple functions through a single integrated system: it既能 measure eye refractive power distribution through the mapping image,又能 detect opacity of the crystalline lens through the diaphanoscopic image. This multi-functionality eliminates the need for separate specialized devices for each measurement type.
2Reliability
If diaphanoscopic image is displayed separately for checking measurement reliability, then reliability check is possible, but variation of eye refractive power distribution caused by lens opacity cannot be checked
Solution Approach 1:
The patent merges the separate display functions of mapping images and diaphanoscopic images into a unified display system. By showing both image types simultaneously on the same monitor with synchronized positioning, the system preserves all measurement information while enabling comprehensive reliability assessment that accounts for lens opacity variations.
3Loss of information
If multiple images are displayed on separate monitors, then comprehensive information is provided, but operation complexity and space requirements increase
Solution Approach 1:
The patent consolidates multiple display functions into a single monitor by implementing a unified control part that manages both mapping image and diaphanoscopic image display. This integration reduces the number of separate devices needed, simplifies the display system architecture, and decreases space requirements while maintaining comprehensive information presentation.
Solution Approach 2:
The control part is designed as a multi-functional unit that can simultaneously process, coordinate, and display different types of ophthalmic images on a single monitor. This universal display capability eliminates the need for separate dedicated displays for each image type, reducing overall system complexity.
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
Enables easy detection of opacity in the crystalline lens and other factors, providing a more accurate assessment of eye refractive power distribution and wavefront aberration by displaying both mapping and diaphanoscopic images side by side, facilitating the identification of measurement errors and the position of intraocular lenses.
Implementation Method 1
projecting measurement light onto a fundus of an examinee's eye and photo-receiving the measurement light reflected from the fundus
Implementation Method 2
a projection optical system for projecting photographing light onto the fundus
Implementation Method 3
a second image-pickup optical system for photo-receiving the photographing light reflected from the fundus
Data Source
AI summary
An ophthalmic apparatus capable of easily checking opacity of a crystalline lens, and more appropriately evaluating a measurement result on eye refractive power distribution or wavefront aberration, which includes a measurement optical system for projecting measurement light onto a fundus of an examinee's eye and photo-receiving the measurement light reflected from the fundus so as to measure eye refractive power distribution or wavefront aberration, an illumination for an anterior segment, a first image-pickup optical system for picking up an image of the anterior segment, a projection optical system for projecting photographing light onto the fundus, a second image-pickup optical system for photo-receiving the photographing light so as to pick up a diaphanoscopic image, a monitor, a calculation part for obtaining a mapping image based on a result of the measurement, and a control part for displaying the mapping image and the diaphanoscopic image on one screen of the monitor.