Zingirian M
Clinica Oculistica, Università di Genova, Italy.
Metab Pediatr Syst Ophthalmol (1985). 1989;12(1-3):32-3.
Perimetry analyzes the efficiency of the entire visual system, but reveals the deterioration of even one of its components. Optic nerve changes, especially those of ischemic nature, which most frequently involve the middle and advanced age, cause typical perimetric findings. Manual kinetic perimetry is particularly indicated for the detection and definition of sectorial and global contractions. Manual static perimetry provides precise information on defect depth. Automated static perimetry quantifies the defect density in a large number of positions and also provides data on the significance of changes recorded during the follow-up. In normal subjects every type of perimetry shows a physiological decay of light sensitivity as a consequence of the aging of the visual system (about 2 dB per decade) and the reduced efficiency of the optic nerve is undoubtedly one of the components of this functional deterioration.
视野检查分析整个视觉系统的效率，但能揭示其任何一个组成部分的退化。视神经病变，尤其是缺血性病变，最常发生在中老年人身上，会导致典型的视野检查结果。手动动态视野检查特别适用于检测和确定扇形和整体收缩。手动静态视野检查可提供有关缺损深度的精确信息。自动静态视野检查可量化大量位置的缺损密度，并提供随访期间记录变化的意义的数据。在正常受试者中，由于视觉系统老化（每十年约2 dB），每种视野检查都显示出光敏感度的生理性下降，视神经效率降低无疑是这种功能退化的组成部分之一。
