闪光视诱发电位（F-VEP）
眼科项目
≈ ¥200-400
(≈ $30-60)
大约15-30分钟
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项目介绍
闪光视诱发电位（F-VEP）在一般公立医院参考费用约¥140-320，三甲医院参考费用约¥200-400，常用于相关诊断评估与就医安排，费用随医院及地区有所差异。
主要用途
Objective assessment of visual pathway integrity from retina to occipital cortex; diagnosis and monitoring of optic neuritis and multiple sclerosis; evaluation of unexplained visual loss (e.g., functional vs. organic); pre- and post-surgical assessment in optic pathway surgeries; detection of subclinical optic nerve dysfunction; differentiation of anterior (retrobulbar) vs. posterior (cortical) lesions; pediatric vision assessment when behavioral testing is unreliable.
正常值范围
Latency of the P100 wave: 95–115 ms (varies by age, stimulus size, contrast, and refractive correction); Amplitude: 5–20 µV (peak-to-trough); Interocular latency difference: <10 ms; Interocular amplitude ratio: >0.7. Values are highly dependent on testing parameters (e.g., checkerboard size 60′ or 15′, contrast ≥80%, luminance ~50 cd/m², monocular stimulation with refractive correction).
偏低可能原因
Optic nerve demyelination (e.g., multiple sclerosis), optic atrophy (e.g., glaucoma, ischemic optic neuropathy), severe amblyopia, advanced retinal ganglion cell loss (e.g., end-stage optic neuropathies), uncorrected high refractive error or media opacity (e.g., cataract, vitreous hemorrhage) during testing.
偏高可能原因
Rarely clinically meaningful as 'high' amplitude is uncommon; potential contributors include technical artifacts (e.g., excessive electrode impedance, muscle artifact), young age (<10 years) with enhanced neural synchrony, hypermyelination (very rare), or paradoxical amplitude elevation in early inflammatory optic neuritis (transient, not diagnostic); prolonged latency (not amplitude) is far more clinically relevant than elevated amplitude.