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对比敏感度检测通过对物体对比度辨别能力的测定,成为一种新的视觉功能定量检查方法。对比敏感度仪可以灵敏的测定出视网膜和视神经纤维损害状态,广泛应用于临床各种疾病的视功能检查。本系统设计的对比敏感度测试仪可实现视觉系统对比敏感度(CS)、干涉条纹视力(IVA)、眩光对比敏感度(GS)等测试功能。系统采用了Mega系列单片机Atmega16作为主控芯片,充分利用了单片机本身的资源,在软硬件设计方面也进行了充分的优化,使系统具有成本低廉、功能强大、操作和使用简便等优点,具有较高的推广应用价值。
Contrast sensitivity testing through the determination of the contrast of objects to determine the ability to become a new visual function of quantitative inspection methods. Contrast sensitivity instrument can be sensitive to determine the damage of the retina and optic nerve fibers, widely used in clinical visual function tests for various diseases. The contrast sensitivity tester designed by this system can realize the test functions of contrast ratio (CS), IVA and contrast ratio (GS) of vision system. The system uses Mega series microcontroller Atmega16 as the master chip, make full use of the microcontroller’s own resources, hardware and software design has also been fully optimized, the system has the advantages of low cost, powerful, easy to operate and easy to use, compared with High promotion and application value.