Contact lenses may be categorized by their substance features – delicate silicon hydrogel lenses and rigid lens. If it comes to knowing which sort of lenses is used in contact lenses, the response has a very wide range.
But by kind, we generally often imply, what's the substance that's utilized to make contact lenses. You can hop over to kjolberg-kontaktlinser.no if you want to know more about contact lenses, their types and their uses.
In previous times, inflexible substances were utilized in connections which didn't support adequate oxygen permeability into the eyes. This caused a great deal of effort and fatigue into your eyes and they couldn't be put on for extended hours in a stretch.
But, research in ocular science gave way to more recent findings and innovative materials were created for creating softer contact lens.
1. Soft Contacts
Soft connections possess high oxygen permeability when compared with their predecessors. Now-a-days, soft contact lens additionally arrives as colored contact lenses which may be used only for decorative purposes.
2. Rigid gas permeable
Rigid gas permeable contact lenses have been named after the kind of material which goes in creating them. But, because of their rigidity, barely any oxygen permeability is potential. Therefore, the users require a more time to adapt to these kinds of contacts.
3. Silicone hydrogel
Silicone hydrogel contact lenses are the consequence of blending hydrophobic silicone using hydrophilic PHEMA. This material offers an enhanced level of relaxation and contains higher oxygen permeability.
4. Intraocular Contacts
All these lenses, made from inflexible material called PMMA or even Polymethylmethacrylate and are implanted in the eye. Now-a-days, intraocular lenses are made from soft foldable materials such as acrylic or silicone and can easily be implanted inside the eyes.