What is Myopia (near-sightedness), Hypermetropia (far-sightedness), Astigmatism, Presbyopia?

Can I wear contact lenses even If I am presbyopic?

What is a polarized lens?

How much time should I wait to get used to my new glasses?

Can I go to bed wearing my contact lenses?

What should I consider when choosing glasses?

Why should we throw away our contact lenses when they are still comfortable?

What is the best way to clean my glasses?