2 sentences

1. 他因为过度疲劳，以致在开会时睡着了。

   tā yīn​wèi guò​dù pí​láo, yǐ​zhì zài kāi​huì shí shuì​zháo le.

   He fell asleep during the meeting due to excessive fatigue.

   Source: Dong Chinese Dictionary

2. 由于他长期熬夜，以致视力下降得很厉害。

   yóu​yú tā cháng​qī áo​yè, yǐ​zhì shì​lì xià​jiàng de hěn lì​hai.

   Because he stayed up late for a long time, his eyesight has deteriorated significantly.

   Source: Dong Chinese Dictionary