|
Rigid Contact lenses, or hard lenses as they are more commonly known as, were first developed in the 1940 's . The material that was used to make these is known as PMMA or Lucite, a short form of polymethyl methacrylate. Until the advent of soft contact lenses these were the standard material for lenses. For people suffering from astigmatism, these lenses offer the best solution. They replace the natural curve of the cornea of the eye with a new surface which provides a better vision.
Most doctors will recommend only rigid lenses for patients suffering with this disease. The advantages of using these lenses are many. Since they are less absorbent, they give rise to fewer allergic reactions to the cleansing agents. They last longer than the softer lenses since they are more durable. These lenses are generally cheaper than the soft contact lenses.. However one of their biggest disadvantages is that since they are less absorbent they also restrict the flow of oxygen to the cornea.
This may cause discomfort among some users, while many can continue using them without any serious complications. As with all contact lenses, we emphasize the need for proper care and cleaning again and again. Rigid contact lenses have improved a lot since they were first introduced. The materials have improved a lot, they are much more comfortable and easy to use, and the cleaning materials have also improved to a great extent. Hence rigid contact lenses are being prescribed much more frequently nowadays. Patients with corneal scarring or with irregular or bumpy cornea surfaces are unable to use soft lenses, hence they use only the rigid lenses. However, they are initially not as comfortable as soft lenses, and require a longer gestation period. Often if you have not used them for a certain length of time, they may require readjustments.
Sometimes they have a tendency to slip away from the center of your eye, which may cause some discomfort and a blurring of the vision. Clean, rinse and dry your lens every time you put them on - even if this is done several times a day. This is true even for soft lenses, and is often not followed by the habitual lens users. If there is any kind of damage to your lenses such as chipping or scratching - do not use them - replace them immediately.
Contact Lens | Privacy Policy | Terms And Conditions |
|