noun, noun which may take the genitive case particle 'no'
amblyopia; weak eyesight
Medical term for reduced vision not correctable by glasses or contact lenses; also used more broadly for poor vision.
彼は子供の頃から弱視で、眼鏡をかけてもよく見えない。
He has had amblyopia since childhood, and even with glasses he cannot see well.
弱視の治療には、小さいうちからの訓練が大切だ。
For treating amblyopia, early training from a young age is important.
Compound of 弱 (weak) and 視 (vision), directly meaning 'weak sight'. The medical sense of amblyopia is a modern usage.