一葉障目 [－叶－－]

Jyutping jat1 jip6 zoeng3 muk6
Pinyin yī yè zhàng mù

Definitions (CC-CEDICT)
  1. lit. eyes obscured by a single leaf (idiom)
  2. fig. not seeing the wider picture
  3. can't see the wood for the trees
Definitions (Wiktionary)
  1. phrase, idiomatic
    blinded by only looking at one thing and not considering others; confused by partial or superficial things