FD
Thanks but still not clear My limited understanding is that the 6m line on the chart(fourth line up correct me if I am wrong)when read at a 6m distance gives 6:6(20/20) vision
My question is can you relate the dioptre figure given on your prescription to your visual acuity without refractive correction.
My interpretation of your post is that two people with say 6:24 vision could be prescribed with different refractive correction correct me if I am wrong "excuse the pun"