Contact lenses improve lives. contact lenses are an example of a(n) (1 point)

The right answer is C.invention

Contact lenses are placed directly on the surface of the eye to correct your eyesight.

They can correct myopia and hyperopia. They can also correct age-related astigmatism and hyperopia (presbyopia).

Their principle is the same as for glasses: they bend the light and redirect it to your retina to improve your eyesight.

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.