20/40 is a measurement of visual acuity (how sharply you see). Read on to learn about the meaning behind the numbers and whether 20/40 vision is “bad.”
Giving Sight to the Blind
The Eye Chart, Explained
What are the various levels of vision and what do they mean
What Is 20/40 Vision? (Is It Bad?)
20/40 Vision: What Does It Mean & Is It Bad?
What is the meaning of 6/24 in eye vision and what is the 40
Can Pilots Wear Glasses? Do Pilots Need 20/20 Vision?
再入荷 Timer 20 【¥20,000値下げ中!】デロング twenty ワッペン入り Wikimedia スタジャン Commons レッド ジャケット/アウター
20/15 Vision: Better or Worse Than 20/20? - All About Vision
20/20 Vision. 20/10 Vision. 20/40 Vision. What do all these
How Bad Is My Eye Prescription?
Low Vision and Vision Rehabilitation