The conversation between human and AI assistant.
I have short sight of 5.5 , under which category do I fall 6/12 or 6/18?
Oh, I see. Can you explain what exactly 6/18 means?
Sure! In the visual acuity ratio system, 6/18 means that you can see at 6 meters what a person with normal vision can see at 18 meters. Basically, it means that you have lesser visual acuity than a person with normal vision.