One of the best inventions in recent memory in relation to vision is most definitely contact lens. The requirement to wear glasses have severely limited the options of what activities and sports people could do.
What contact lens have been able to do is effectively allow a person to perform as if they did not have any requirement for glasses. This gives them the freedom to participate in many sports and functions that they could not do in the past. One of the biggest things being contact sports where a person with glasses would have no way of joining in with previously.
contact lens work in a very similar way to glasses. The lens bends the light so that it enters the chamber of the eyes in the correct angle.
In Australia, contact lens are reasonably priced however there are online stores like vision direct which offer great deals. You can get a vision direct coupon as well which also makes the contact lens even cheaper!