yes
Michelle Ryan has not publicly disclosed any information about her eyesight, so it is unknown whether her eyesight is considered perfect or defective.
yes
No, there is one famous quote I like: "practice maker perfect, but nobody's perfect, so why practice..?"
The numeric term that describes perfect eyesight is 20/20 vision. This measurement indicates that a person can see clearly at 20 feet what should normally be seen at that distance. It serves as a standard for comparing visual acuity, with higher numbers indicating worse vision.
20:20
a pilot is someone who drives an aeroplane. he or she must have perfect eyesight
depends on the person's eyesight and the amount of visibility
Yes, this elliptical trainer is easy to use as long as proper instructions are given to the person with limited eyesight.
Yes, eyesight can improve. Often, the improvements develop naturally as a person ages, especially through middle-age. For example, a severely near-sighted person at age 7 years old may later find the near-sightedness has improved by the time they are over 40-years old. Conversely, eyesight can also deteriorate as a person ages. Some people who had 20/20 (perfect) vision as a child, teen, and young adult suddenly finds their sight has diminished in middle age.
3.5 miles in perfect viewing conditions and keen eyesight.
I don't really think so, because who can really put together the perfect date? All that matters is that the person you are with is happy.
If someone's eyesight is confocal it means that the person can enable the reconstruction of three-dimensional structures from the obtain images. Confocal eyesight has gained popularity in the scientific and industrial communities and typical applications.