Reader Comments


by sai yash (2019-04-17)

The first contact lenses were hard and made of blownVisirestore Review/ glass. It is hard to imagine that anyone could stand wearing those. Later on, in the 1959, a pair of Czech chemists invented the soft contact lenses. This was a crucial milestone as they were the first hydrogel soft lenses. That made them not only comfortable to wear, but also healthier for your eyes. The eye needs moisture, which it produces naturally. Early lenses did not allow for moisture or oxygen to penetrate and reach the cornea. However, they were only available to correct certain vision defects and required a doctor's prescription. In the 1980's, many improvements were made: extended wear, disposable, and coloured lenses began to appear at the opticians' shops. Those with good vision were left out until plano lenses became available.