Normal visual acuity is considered to be 20/20 vision, which is line 8 on the Snellen Eye Chart. This means that from 20 feet away, you can read that line clearly without correction. "Perfect sight" is just a term, but visual acuity is more apt.
Normal visual acuity is considered to be 20/20 vision, which is line 8 on the Snellen Eye Chart. This means that from 20 feet away, you can read that line clearly without correction. "Perfect sight" is just a term, but visual acuity is more apt.
Normal visual acuity is considered to be 20/20 vision, which is line 8 on the Snellen Eye Chart. This means that from 20 feet away, you can read that line clearly without correction. "Perfect sight" is just a term, but visual acuity is more apt.