We examined a middle-aged man with a prominent yellow forelock who complained of loss of vision in both eyes. He smoked his pipe avidly and drank a little Bourbon whisky daily. The nicotine content of the forelock (21.7 ng/mg) was 10 times that of the hair on his occiput (2.23 ng/mg). A yellow forelock when associated with isolated painless visual loss suggests tobacco amblyopia.
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机译：我们检查了一个有明显黄色前额的中年男子，他抱怨双眼视力下降。他狂热地抽烟斗，每天喝一点波旁威士忌。前额的尼古丁含量（21.7 ng / mg）是其枕骨上的尼古丁含量（2.23 ng / mg）的10倍。与孤立的无痛视力丧失相关的黄色前兆表明烟草弱视。
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