电脑视觉综合症
游戏玩多了，不会变成 游戏脑。但电脑用多了，可能会出现电脑视觉综合症（computer vision syndrome，后文简称为 CVS）
这是眼睛长时间聚焦在显示器，导致眼睛的聚焦能力下降的复杂综合症。CVS 的症状有头晕、头痛、眩晕、眼睛干涩、疲劳、发炎、视力模糊、颈部疼痛等。
根据 一篇论文 转述的消息，美国国家职业安全与健康研究所发现，大约每天在电脑前花费 3 小时或以上的人，其中 90 % 都患有 CVS。
治疗或者缓解手段，主要是不让眼睛过于疲劳。比如保证睡眠时间充分，多眨眼，使用电脑时要经常看远处（番茄钟对此会很有效），如果有干眼症则使用人工泪液或加湿器，夜间将电脑界面设置为深色主题，更大的字体等。
如果有佩戴眼镜，可以专门配一个度数小一些的，仅能看清屏幕的眼镜，这样也能缓解疲劳。这副眼镜还可以加上抗反射涂层，不过这是 美国验光协会 提出的利益相关建议……
#症状
Bitcoin is a decentralized digital currency that you can buy, sell and exchange directly, without an intermediary like a bank. Bitcoin’s creator, Satoshi Nakamoto, originally described the need for “an electronic payment system based on cryptographic proof instead of trust.” Each and every Bitcoin transaction that’s ever been made exists on a public ledger accessible to everyone, making transactions hard to reverse and difficult to fake. That’s by design: Core to their decentralized nature, Bitcoins aren’t backed by the government or any issuing institution, and there’s nothing to guarantee their value besides the proof baked in the heart of the system. “The reason why it’s worth money is simply because we, as people, decided it has value—same as gold,” says Anton Mozgovoy, co-founder & CEO of digital financial service company Holyheld.
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