Which of the following lenses are intended to be used for daytime and keeping them overnight for cleaning and disinfecting?
1 of 5
Daily wear contact lenses have to be removed before sleeping as they must be cleaned and disinfecting by keeping them in a solution for overnight. Extended wear contact lenses can be used for a period of 7 days to 30 days and they can be worn while sleeping. Daily disposable lenses have to be discarded once you wear them, so they do not need maintenance. Nowadays, weekly and monthly disposable lenses are also available. These lenses are best for candidates who are allergic to lenses and who are concerned about getting an eye-infection due to bacteria build up under the lens.
Which of the following materials is used to make long-wear lenses?
2 of 5
The extended-wear lenses are made up of silicone hydrogel. This special material allows more oxygen to penetrate than the standard soft lenses. These extended-wear lenses can, therefore, be worn for a period of one week to one month, depending upon the quality of the lens and your eye health. But it is recommended that you remove them once a week for cleaning and disinfecting.
Which of the following points should you consider while choosing the right contact lens for your eyes?
3 of 5
While selecting the contact lenses, you should consider the frequency of use, how carefully you keep them, the clarity that you want, and whether you are allergic to them.
Which of the following type of contact lens is suitable for reducing lens-related allergy symptoms?
4 of 5
Daily disposable soft contact lenses are the best if you have an allergy related to the lens. Allergens cannot build up in these lenses as they have to be replaced on a daily basis.
Which of the following lenses is used for the correction of astigmatism?
5 of 5
Toric lens is used to correct astigmatism. Soft and hard contact lenses are used for near-sightedness and far-sightedness. Multifocal contact lenses are used to correct presbyopia.