しりょくていか
視力低下
Low vision
ものがぼやける(はっきり見えない)、目がかすむ(はっきり見えない)、二重に見えるなどの症状がある。視力低下の原因は角膜(cornea)や水晶体(crystal lens)が濁ったり、網膜(retina)中央部の黄斑(yellow spot)が障害されると起こる。
This includes symptoms such as things becoming blurred (not able to be seen clearly), eyes becoming misty (not able to see clearly), things look double (double vision), and so on. The causes of low vision occur when the cornea and/or the crystalline lens become cloudy, and the yellow spot on the center of the retina becomes impaired.