Question

mention the uses of lenses in day to day life

Answer 1

Mirrors are often put on the dials of old voltmeters, the kind which has a needle indicator which moves to indicate the voltage on a dial. The problem with these is that if you look at them from the side, you can read the wrong number. The mirror is there to help get the right reading. If you look at it straight on, the needle and its reflection will line up, and then you are sure you are reading in in the right place. 

Mirrors are used to collect sunlight for solar power generation. 

Answer 2

most high quality cameras, telescopes and binoculars are concave lenses to improve the quality. microscopes make use of a concave mirror. the lenses are used in designing some of optical devices such as telescopes and also medical glasses.