All through time there have been varied technique of correcting imaginative and prescient. There was the monocle, then the glasses that have been on a sequence or a stick, after which there have been eyeglasses as we all know them at present however there weren’t as many kinds as there at the moment are. As expertise improved the lenses of glasses have been getting smaller. Since many individuals have been all the time shedding or breaking their eyeglasses they have been hoping for a method to put on glasses and never have to fret about them being misplaced or breaking them.
Contact lenses got here alongside and so they have been nice however costly. Should you misplaced them or dropped them you would need to get new ones. I knew of somebody who misplaced one in all her contact lens and he or she had developed an an infection in her eye. The physician examined her solely to seek out the contact lens had slipped and was not within the correct place. Conventional contact lenses have been inflexible and took some getting used to colored lenses.
Folks have been in search of softer and extra versatile lenses and lenses they might simply put in. Softer lenses got here out after which as a result of they needed to be eliminated each night time and cleaned, folks began to lengthy for lenses they might put on on a regular basis. As the costs got here down and extra folks have been in a position to buy contacts, they have been getting sick and bored with cleaning them on a regular basis and of the expense of all of the cleaning options wanted.
It could be nice, they thought, to have the ability to throw out the lenses every night time and remove the necessity for the cleaning answer. 1987 saw the introduction of disposable contact lenses and so they have been design-ed to be worn for a selected period of time earlier than having to be re-placed. There are some phrases and explanations that you must be acquainted to grasp disposable contact lenses.
* Disposable Contact Lenses – they’re discarded and changed after two weeks if not sooner.
* Frequent alternative lenses – they’re changed each one to 3 months. Conventional/Reusable – these are changed each six months if not earlier than.
* Prolonged put on lenses – you possibly can sleep in them for as much as two weeks.