German
ophthalmologist Adolf Fick embarked the journey of optometry with a pioneering
method of refractive error correction, the “contact glasses”. The first
breakthrough occurred when Bausch+Lomb launched the SofLens in the United
States, using patents held by the National Patent Development Corp. and
with that, the modern contact lens industry was born.
Contact lenses are the medical contraption
taken over directly on the cornea of eye to amend refractive blunders by adding
or subtracting converging power to the eye's lens. Depended on the type of
material, lenses are opted for patients by five types:
Soft lenses are made of hydrogels, a gel-like and water-containing plastic molecules. They are very thin lenses and flexible and imitate to the eyes front surface.
Silicone hydrogel lenses are the progressive type of soft contact lenses which allow more oxygen to reach the cornea and are more permeable than regular hydrogel lenses.
Gas permeable lenses (GP or RGP lenses) are inflexible contact lenses that are absorbent and permit oxygen to traverse them. They often afford high-pitched vision than soft and silicone hydrogel contacts, particularly in case of astigmatism.
Hybrid contact lenses are premeditated to afford wearing coziness which adversaries soft or silicone hydrogel lenses, along with the crystal-clear optics of GP lenses. They have a firm gas permeable central zone enclosed by a "skirt" of hydrogel or silicone hydrogel substantial.
PMMA lenses are made from a translucent unbending plastic solid called polymethyl methacrylate (PMMA). They have brilliant optics, but they cannot diffuse oxygen to the eye and thus can lead difficult to acclimate.
Soft lenses are made of hydrogels, a gel-like and water-containing plastic molecules. They are very thin lenses and flexible and imitate to the eyes front surface.
Silicone hydrogel lenses are the progressive type of soft contact lenses which allow more oxygen to reach the cornea and are more permeable than regular hydrogel lenses.
Gas permeable lenses (GP or RGP lenses) are inflexible contact lenses that are absorbent and permit oxygen to traverse them. They often afford high-pitched vision than soft and silicone hydrogel contacts, particularly in case of astigmatism.
Hybrid contact lenses are premeditated to afford wearing coziness which adversaries soft or silicone hydrogel lenses, along with the crystal-clear optics of GP lenses. They have a firm gas permeable central zone enclosed by a "skirt" of hydrogel or silicone hydrogel substantial.
PMMA lenses are made from a translucent unbending plastic solid called polymethyl methacrylate (PMMA). They have brilliant optics, but they cannot diffuse oxygen to the eye and thus can lead difficult to acclimate.
Contact
lenses are offered in a variety of strategies, reliant on their envisioned
purpose:
Spherical contact lenses have the identical lens power throughout the complete visual part of the lens to accurate hyperopia (farsightedness) or myopia (nearsightedness).
Toric soft contact lenses have diverse powers in different peaks of the lens to accurate nearsightedness or farsightedness as well as astigmatism.
Multifocal contact lenses comprise of various power zones for near and far vision to precise presbyopia as well as myopia or hyperopia. Some multifocal lenses can correct astigmatism also.
Cosmetic contact lenses consist of color contacts premeditated to alteration or strengthen the eye color. Theatrical, Halloween and other special-effect contacts also considered as cosmetic lenses.
Spherical contact lenses have the identical lens power throughout the complete visual part of the lens to accurate hyperopia (farsightedness) or myopia (nearsightedness).
Toric soft contact lenses have diverse powers in different peaks of the lens to accurate nearsightedness or farsightedness as well as astigmatism.
Multifocal contact lenses comprise of various power zones for near and far vision to precise presbyopia as well as myopia or hyperopia. Some multifocal lenses can correct astigmatism also.
Cosmetic contact lenses consist of color contacts premeditated to alteration or strengthen the eye color. Theatrical, Halloween and other special-effect contacts also considered as cosmetic lenses.
More
Fascinating Features to keep an eye on Contact Lenses:
Bifocal contacts for astigmatism - These are cutting-edge soft contacts which accurate both astigmatism and presbyopia, so that anybody can endure glasses-free also after the age of 40 if they are having astigmatism.
Contacts for dry eyes - Eyes can become uncomfortably dry at sometimes. Well, certain soft contact lenses are specifically made to decrease the hazard of this dry eye symptoms.
Colored lenses - Lenses in colors can definitely boost the natural beauty of eyes. They can make green eyes even greener or can change the color of eyes totally, as in from brown to blue.
Special-effect lenses – They are called novelty, or costume lenses, theatrical, special-effect contacts which can lead someone looking one step further making them look like a cat, a vampire, or another alter-ego of their choices. Remember Avatar, Mystique (X-Men Character), the Beast or any vampire character?
Prosthetic lenses - Colored contact lenses may be used for medical purposes too. Impervious soft lenses are known as prosthetic contacts which can be custom-designed for an eye when the eye has been blemished by injury or disease to cover the blemish and match with the appearance of another natural eye.
UV-inhibiting lenses - Some lenses help us to defend our eyes from the ultraviolet rays which can cause cataracts and other eye problems.
Bifocal contacts for astigmatism - These are cutting-edge soft contacts which accurate both astigmatism and presbyopia, so that anybody can endure glasses-free also after the age of 40 if they are having astigmatism.
Contacts for dry eyes - Eyes can become uncomfortably dry at sometimes. Well, certain soft contact lenses are specifically made to decrease the hazard of this dry eye symptoms.
Colored lenses - Lenses in colors can definitely boost the natural beauty of eyes. They can make green eyes even greener or can change the color of eyes totally, as in from brown to blue.
Special-effect lenses – They are called novelty, or costume lenses, theatrical, special-effect contacts which can lead someone looking one step further making them look like a cat, a vampire, or another alter-ego of their choices. Remember Avatar, Mystique (X-Men Character), the Beast or any vampire character?
Prosthetic lenses - Colored contact lenses may be used for medical purposes too. Impervious soft lenses are known as prosthetic contacts which can be custom-designed for an eye when the eye has been blemished by injury or disease to cover the blemish and match with the appearance of another natural eye.
UV-inhibiting lenses - Some lenses help us to defend our eyes from the ultraviolet rays which can cause cataracts and other eye problems.
New researches are emerging the
modern era with explorations in the arena of contact lens, whether it is Biotrue Oneday lenses with recycling program
to keep Mother Earth cleaner or Aquaform
Technology to retain moisture in eyes even reducing blinking with Biofinity
Energys. According to the report, “The global contact lenses market size
was valued at USD 9.91 billion in 2016 and is expected to sustain its growth
pace over the forecast period”. So true to say that the contact lenses are “As Modern as the World of Tomorrow”.
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