In which optical condition would the 20/20 vision be affected the least?

The choice pointing to normal vision as the condition where 20/20 vision would be affected the least is accurate because individuals with normal vision have the ability to see clearly at 20 feet what should normally be seen at that distance. This means they do not have any ocular refractive errors or other conditions that impair visual acuity.

In contrast, uncorrected myopia may lead to blurred distance vision, making it difficult to see objects clearly when they are far away. Uncorrected hyperopia, particularly when it is significant, can hinder near vision and may also lead to blurred distance vision in some cases. Corrected astigmatism, while better than uncorrected forms, still requires some degree of correction to attain optimal vision, and without proper correction, vision can vary significantly.

Thus, in the context of visual clarity and acuity, normal vision is the benchmark against which all other conditions are measured, hence it would experience the least impact on the 20/20 vision status.