Unverified78% confidenceDecision RuleTime unknown

检测时的照度是被忽视的关键变量，视力表灯箱应保证视标亮度在80-320cd/m²（约300-700lux环境光），自发光背光灯箱比纸质挂图+外部照明更稳定可靠

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视力检测工具category

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Unverified护眼台灯优先选国AA级照度认证（GB/T 9473-2017），中心照度≥500lux且半径30cm范围内照度≥250lux，AA级比A级的照度均匀度要求更高84% similar Unverified亮度调节应支持无级调光（1%-100%）而非只有3-5档，无级调光才能精细匹配环境光避免过曝84% similar Unverified灯珠密度≥60灯珠/米才能避免明显的光点颗粒感，用于间接照明或灯槽藏光建议≥90灯珠/米实现连续光带效果83% similar

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