VA is visual acuity which is a fancy way of saying eyesight. Do you wear glasses?
I'm supposed to but don't wear them very often. I didn't know it had a technical name.
Yeah so VA is dependent on optical and neural factors. You should wear your glasses!
I know I should. So it's basically a team working together for people to be able to see?
Yeah basically! When they don't work well it's called ametropia, which is refractive error. That is how the light is refracted in the eyeball.
Oh ok, that's interesting! What else do you know about eyesight?
I know a lot! Like for example, refractive errors are caused by a lot of things like the shape of an eyeball, or the shape of a cornea. Even reduced flexibility of the lens in your eye.
Is there a way to strengthen eyesight without glasses? Like exercises or something?
in the retina or the brain (or the pathway leading there). Examples for the first are a detached retina and macular degeneration, to name just two. Another common impairment, amblyopia, is caused by the visual brain not having developed properly in early childhood. In some cases, low visual acuity is caused by brain damage, such as from traumatic brain injury or stroke. When optical factors are corrected for, acuity can be considered a measure of neural well-functioning.
Visual acuity is typically measured while fixating
on the issue of Zunera Ishaq wishing to wear a niqab at her citizenship ceremony. Miller said, "if you don't like that or don't want to do that, stay the hell where you came from, is the way, and I think most Canadians feel the same... I'm so sick and tired of, of people wanting to come here because they know it's a good country and then they want to change things before they even really officially become a Canadian, so , I have no sympathy for