The progress in the medical technology has provided us the alternative – Contact lens to the conventional way – Spectacles to treat eye disorders. Till a few years ago there was only a single type of contact lenses.
But today you can find various types of contact lenses such as disposable contact lens, ’round the clock lenses’ (better known as ‘døgnet rundt linser‘ in the Norwegian language). Thus you can buy the contact lens according to your own requirements and the suggestion made by your ophthalmologist. This has made possible for more people to wear contact lenses than ever before.
Following underlined are all the commonly found types of contact lenses:
- PMMA lens – These are popularly known as hard contact lenses and are the oldest types of contact lenses. This type of contact lens are very durable, but their disadvantage is the fact that they do not allow oxygen to reach the cornea directly.
- Soft contact lens – These are the lenses that are used most often. They are made of plastic and other materials such as silicone. They also allow the oxygen to directly reach the cornea. There are also different types of soft contacts such as:
Daily disposable lens. They are for daily use and are disposed at the end of the day. These are more expensive, but the risk of developing an eye infection is minimal.
Daily disposable toric contact lenses (better known as ‘daglige disponible toriske kontaktlinser‘ in the Norwegian language ). These are used for correcting astigmatism.
Extended wear lens. These usually last 2-4 weeks. The risk of infection is higher and they do tend to be somewhat expensive, but the wearer is able to wear the contacts day and night for 30 days without having to take them out.
Moreover, you may check out this useful reference to read about the common mistakes made by people related to contact lens. This info will help you in being aware of those mistakes so that you can ensure to not repeat them which will save you from getting any sort of eye infection.