Contact Lenses Rigid

Contact lenses are thin sheets of plastic with special refractive indexes that help envision the people with some sort of myopic or other vision related illnesses. The contact lenses being used all over the world now are soft and smooth which are very comfortable to wear. Rigid contact lenses are old contact lenses which are pretty outdated these days due to the modern types of contact lenses available today.

Rigid contact lenses were made up of Polymethylmethacrylate or “PMMA”, a type of plastic. They were very durable and had excellent vision correction abilities. They became outdated due to two main reasons.

These rigid contact lenses weren’t comfortable. They were hard and rigid and eyes usually got tired of wearing them just after few hours because they trapped the oxygen from reaching the cells in the cornea. The pupil, hence, discount contact lens didn’t move much with change in lighting conditions and hence that affected the vision. This also caused swelling in the eyes sometimes. Also, sometimes, if you wore lenses for longer times, the cornea would adapt itself to the shape of rigid contact lenses and hence you couldn’t revert back to using glasses very quickly. The transition period typically extended to two to three days.

Rigid contact lenses are very rigid and typically last two to three years of regular usage. Although due to the ease and comfort being offered by the more recently developed contact lenses, rigid or hard contact lenses are becoming obsolete.

Rigid contact lenses Researchers from Institute of Health and Biomedical Innovation, School of Optometry, Queensland University of Technology, in Kelvin Grove, Queensland, Australia. Rigid Gas Permeable Contact Lenses Product Description For Rigid Gas Permeable Contact Lenses. Sterile. Rewets. Lubricates. Boston Rewetting Drops help you keep your lenses comfortable by coating the lens surface and restoring the natural tear layer, allowing for longer. RGP contact lenses “the efficacy of custom-made reverse geometry rigid gas permeable (RGP) contact lenses in the control of symptoms related to increased wavefront aberrations after LASIK correction of myopia.”

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10/7/2009 6:59:47 PM Robbie kim