What Are Bifocal Glasses?

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asked 4 days ago in Electron Microscopy by jeromeprincy (9,780 points)

 

The modern contact lenses were discovered few Vision 20/20 Protocol Ebook Review  years back and now they are used at large extent all over the world. Contact lenses were often considered as replacement of the glass spectacles; but there are certain disadvantages due to which the contacts cannot be regarded as such.  Both the contact lens and the eye glasses provide exact protection to the human eyes; but both share some advantages over each other. 

However, very few people keep in mind the disadvantages of the contacts as they are better than the eye glasses in almost all aspects. Maximum numbers of spectacle users have shifted to the contact lenses in the past few years, because of the excellent facilities provided by the lenses. The only disadvantage that the contact lenses have got is its cleaning and disinfecting.  This takes a lot of time and patience. 

A contact lens is cleaned and disinfected using the solution provided with it. This solution is prepared solely for cleaning the lenses. Before going to bed, people should remove the lens from the eyes and keep it soaked in the solution for the whole night. Then, before using it again, it should be rubbed with a clean piece of grease free cloth gently and cleaned. Contact lenses are very elegant; a little scratch can damage a contact lens permanently. People must take immense care of the lenses while cleaning it. 

 

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