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首页> 外文期刊>Japanese Journal of Ophthalmology >Effect of decreased retinal illumination on frequency doubling technology.
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Effect of decreased retinal illumination on frequency doubling technology.

机译：降低的视网膜照度对倍频技术的影响。

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摘要

PURPOSE: To investigate the effect of changes in retinal illumination on Frequency Doubling Technology (FDT). METHODS: Five eyes, of 5 adults who were free from identifiable ocular pathology, were examined using the Snellen chart and the Pelli-Robson chart, conventional automated perimetry, and the full threshold N-30 program of FDT. Each test was performed with and without a 0.9, 1.5, or 2.4 log unit neutral-density (ND) filter placed before the eye. Furthermore, the influence of pupil diameter on FDT test results was compared after treatment with pilocarpine or cyclopentolate with the influence of ND filters. RESULTS: All tests showed a decrease in sensitivity with decreasing retinal illumination. Frequency Doubling Technology showed an especially pronounced and significant decrease in sensitivity. The maximum mean threshold difference in FDT results with ND filter was 31.2 dB while that with the Humphrey Field Analyzer and the Pelli-Robson chart were 13.3 dB and 0.66 log contrast, respectively. The mydriatic state of the pupil increased the sensitivity of FDT and the miotic state decreased it to about the same extent as the the 0.9 ND filter. CONCLUSION: The change in retinal illumination has more impact on FDT than on spatial contrast tests and conventional automated perimetry. It is important to take this into account in evaluating FDT results.
机译：目的：探讨视网膜照明变化对倍频技术（FDT）的影响。方法：使用Snellen图和Pelli-Robson图，常规自动视野检查以及FDT的全阈值N-30程序，对5名成年人中的5只眼睛没有可识别的眼部疾病进行了检查。每次测试在眼前放置和不放置0.9、1.5或2.4对数单位中性密度（ND）滤镜的情况下进行。此外，比较了用毛果芸香碱或环戊酸酯处理后，ND滤镜对瞳孔直径对FDT测试结果的影响。结果：所有测试均显示随着视网膜照度的降低敏感性降低。倍频技术显示出灵敏度的显着降低。使用ND滤波器的FDT结果的最大平均阈值差为31.2 dB，而使用汉弗莱现场分析器和Pelli-Robson图的最大平均阈值差分别为13.3 dB和0.66 log对数。瞳孔的散瞳状态增加了FDT的灵敏度，而瞳孔的散瞳状态使FDT的灵敏度降低到与0.9 ND滤镜大致相同的程度。结论：视网膜照明的变化对FDT的影响大于对空间对比测试和常规自动视野检查的影响。在评估FDT结果时，必须考虑到这一点。

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