Keep yourself updated with information on contact lenses
Still wearing those shabby outdated glasses? Modern age educates us how to live accordance with time. So, if you are wearing glasses, its time for a change. A shift to contact lenses can be fruitful in the section of both fashion and vision factors. Contact lenses which are also known as contact, has corrective, cosmetic and therapeutic use. In 1508, Leonardo da Vinci made a sketch of his first ideas about contact lenses. After about 3 centuries, it was fabricated and put to use. However, Otto Wycherley, a Czech chemist is credited with the fabrication of modern contact lenses and the gel used with it.The main use of these lenses is for corrective purposes and at the same time, being lightweight and virtually invisible, it is easier to wear them. Some types of lenses are treated with UV coating which helps the eye to stay safe from malicious ultraviolet rays shot by sun. Without medical use, it is also popular among youngsters because it enhances their fashion quotient. Now, deliberately colored lenses are also available for altering the appearance of the eye. Moreover, lenses tend to offer better result on certain ophthalmologic conditions such as keratinous and anise Konia which can not be properly cured with glasses.
However, there are several types of contact lenses available. Details are provided which will encourage you to have enough knowledge about lenses.
General divisions of lenses are briefed below:
Soft contact lenses:soft types are made of a soft polymer-plastic which can absorb 30 to 80 percent water. Water in the soft plastic allows oxygen to pass through the cornea. Soft contact lenses can absorb polluting particles and hence it is a subject to care for. On wear basis, it can be of two types—daily disposables which can be worn for one day, especially designed for hypo allergenic eyes and silicone extended wear disposables which can be worn for up to 30 days. Other types of soft contact lenses have variations in colors.
Rigid gas permeable lenses:
it is more rigid than soft types and durable also. It is generally made of silicone polymers, allowing oxygen to pass through the cornea.
These rigid types are extremely durable and can be worn overnight.
Bifocal lenses:
bifocal lenses are framed to give better performance in ophthalmologic condition like presbyopia. To cure presbyopia, both bifocal and manumission designs are effective and can be made of both soft and rigid gas permeable lenses.
Toric lenses:
Toric lenses are specially made for patients with astigmatism. These lenses have two powers, one for the astigmatism and another for near or far sightedness.
Lenses curved for ortho-k:
ortho-k or orthokeratology is a corneal reshaping treatment. Rigid gas permeable lenses are specially design to give the cornea a perfect shape, and therefore, to rectify vision.
Decorative lenses:
people wear this type of lenses not for any corrective purpose but to change the appearance of their eyes.
However, it is your doctor who can tell you what type of lenses you need. Wearing contact lenses without any prescription can damage your eyes. Please be cautious.
By: Marie Chrismer
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