Research And Application Of Visual Field Examination System Based On Object-oriented Technique

Perimetry plays a very important role in ophthalmology medical care. With the development of electronic technology, the application and development of automatic vision tester have become more and more widely. In order to meet the demands of the developing market, make the vision inspection process more convenient and efficient, based on object-oriented software development technology, this thesis designs a vision inspection system with good reliability, extensibility, reusability and modularization, and the system meets the inspection requirements and technology development.The article simply summarized the object-oriented concepts and analysis, object- oriented unified modeling language (UML) and visual modeling tools-Rational Rose. Using object-oriented technology, requirements analysis is made first, and then static analysis and dynamic analysis is carried out. The conceptual model of the system is established. Based on the conceptual model of the system, the paper designs system architecture, including system layers, subsystems division, as well as dependencies and communication mechanisms between subsystems or layers.Based on the system hierarchy and object-oriented analysis, the article emphasized the design and implementation of subsystems, including data structure of test procedure, man-machine interface window, data access and storage. The key technologies of the split system, video surveillance and serial communication are analyzed and implemented emphatically.The article analyzed the software test carefully. A reasonable test of the software has been designed and carried out completely. The problems in the test have been solved to ensure the reliability of the software.The software of this system developed on Microsoft Visual C++ 6.0 software developing platform. Using MFC library and windows programming technology, Efficiency and quality has been ensured in the development. System can be accomplished with good compatibility, stability, and convenient debugging.The research achievements of this article are focusing on the following: The technology of object-oriented is used in the system analysis and design process. Real-time concurrent task technology is applied in the analysis and scheduling of perimetry task, check feedback task and video surveillance task, and communication and collaboration has been achieved successfully. The design meets the requirements of perimetry. Dynamic list is used to deal with large and complicated data in inspection process. Memory space is saved, and nodes can be quickly inserted or removed, processing speed of procedures has been increased. Using the ODBC technology, the database system interface has been designed to isolate the direct link between the database and system, and encapsulation and expandability of the database system is improved.Object-oriented software development technology is the mainstream in software development. Under the guidance of object-oriented methodology, vision inspection system is implemented with standardization and commercialization. It will lay a good foundation for maintenance, extension and upgrade.