Like a lens, cornea is transparent, thin but very important part in eyes. Generally, the functions of iris must be cooperated with the assistance of cornea. There is no blood vessel in cornea. However, oxygen is very critical for cornea. And oxygen can only be sent to cornea by tear film. Many people in nowadays choose to wear contacts for some eye problems. But for these contacts, oxygen can not be let in thoroughly.
It is true that contacts can let oxygen through, but sometimes they can not. If people wear contacts for very long time, on these lenses will be some wastes that can be barriers for oxygen. So people should replace their contacts often. Still, many people love to sleep in their contacts. This is also a very bad for the health of corneas.
While at night, corneas will expand to some extent. However, contacts will worsen this expansion process which can not be compensated correspondingly. Fortunately, the latest contacts that can let through sufficient oxygen will not worsen the expansion. On the contrary, if the corneas can not get sufficient oxygen, some new tissues will appear on them for more oxygen. Such changes are mainly for some essential needs. However, these tissues will cause some problems on the eyes.
If these tissues are minor and do not grow big, they can be neglected. However, if there are amassing amount of these tissues, corneas will suffer a lot. The results will always be blurriness or even blindness. Luckily, there are some methods that can be used to deal with these problems. One should try not to sleep in their contacts. Of course, one can also choose to wear contacts with perfect oxygen permeability. Nowadays, the manufactures of contacts have noticed that there are some defects in their materials, so they spare no efforts to upgrade their products. The latest ones can now be used to eliminate many complications that often occur in the past.
These contacts can let through almost all oxygen that eyes need. It is true that wastes will be left on the lenses after wearing for very long time. But within certain extend, such waste will not impede the permeability of oxygen. Anyway, people are suggested to follow the advices of their eye doctors in selecting contacts, though there are some new products in the market. The latest lenses can seldom lead to the growth of some tissues in the corneas. However, people should often visit their eye doctors if they find any changes in their eyes, even though they wear some latest lenses.
Wearing rigid gas permeable contacts can help avoid such progression. Some eye doctors now tend to recommend some latest contacts. These lenses are made from very special materials and wearers are less likely to suffer from some in-growth-tissues problems in the corneas than they used to be. The eye doctors have the latest information of these lenses. Nowadays, many famous contacts manufactures are engaged in the research and development of such lenses. Astigmatism and presbyopia can be easily treated with their products. Contacts with perfect gas permeability can promise healthy eyes.
Firmoo.com is the emerging online optical store selling high quality eyewear, such as prescription eyeglasses (single vision myopic glasses, reading glasses, bifocal and progressive eyeglasses etc.,), prescription sunglasses (with RX tinted lenses), prescription sports goggles. Firmoo guarantees lowest possible price in the market. Firmoo’s return and refund policy makes any purchase risk-free ones.
Article Source:http://www.articlesbase.com/vision-articles/how-to-deal-with-ingrowthtissues-in-the-corneas-1683513.html
Read More...
Also called RGPs, rigid gas permeable or oxygen permeable lenses, gas permeable (GP) contact lenses are less-known than soft lenses. RGPs are different from “hard” contact lenses, which have disappeared today, although they were popular before the invention of soft lenses in 1971. PMMA hard lenses are uncomfortable and prohibit oxygen from passing through the lenses.
Invented in the late 1970s, GP lenses contain silicone, which is more flexible than PMMA and allows more oxygen to pass through, creating more comfort and better vision. They also have many other advantages, such as more durable and deposit resistant, easier to clean, and less expensive. However, GP lenses demand a longer adapting period than soft lenses.
GP lens is the right solution for people unsatisfied with soft lenses, such as vision fussy individuals, people with astigmatism, presbyopia or keratoconus, or individuals after a refractive surgery. GP lenses offer the best answer for bifocal lenses for people with presbyopia. Ortho-k lenses also use GPs.
GP lenses are not flawless. They require a regular wearing for most comfort and a longer time to adjust, which never happen to soft lenses. GPs may still cause blurry eyes when they are removed, even if the situation will soon disappear. GP lenses also need more careful cleaning and storing since they last at least one year.
Currently, new versions of lenses that combine the visual clarity from GPs and comfort from soft lenses are available, which remove the most significant obstacle for GPs. These special lenses are used for presbyopia, keratoconus and LASIK recovery.
this article is come from:<a target=”_blank” href=”http://vision.firmoo.com/contact-lenses/gas-permeable-lenses.html”>http://vision.firmoo.com/contact-lenses/gas-permeable-lenses.html</a>
Read More...
Whether you is thinking of switching over to contact lenses from eyeglasses one has already been using or have just been given prescription for corrective lenses for the first time, there are many other things to consider about acquiring contact lenses.
There are many different kinds of contact lenses obtainable on the market: soft contact lenses, gas infiltrated lenses, rigid gas infiltrated lenses, contact lenses in different colors, contacts with dual lens or contact lenses with many lens and etc..
Your eye specialist may turn to the many alternatives with you, however, if you prepare yourself by learning about them prior to using them, you may prepare yourself with related questions to ask at your check up. Your eye care specialist shall turn to various perspective of proper care and sterilizing of your contact lenses, some of which is discussed concisedly under.
Proper Maintenance and Sterilizing.
even what kind of contact lenses you and your eye care specialist analize are suitable for you, proper care and sterilizing of your lenses is vital to maintaining good eye condition. Maintenance and cleaning of one’s lenses shall vary only little depending on if you has been advised prolonged use, daily use or contact lens which can be discarded after use.
You shall need some stosks ready to precisely clean and care for one’s new contacts. The necessary stocks consist: – High quality contact lens mixture – Contact lens case (facts on how to sterilize one’s cases are under) – Soft (gentle) plastic tweezers
Sterilizing one’s contact lenses is not hard, however, it is important to be very detailed and very consistent. To clean one’s contact lenses correctly, simply do the procedures under:
1.Wash and sponge one’s hands carefully prior starting the process.
2.Get each lens from the case and wash with multi-purpose mixture by ejecting the mixture onto both sides of the lens.
3.Pour one’s lens case with new mixture, put the lenses in the case, and screw the case closed. Allow the contact lenses soak for about 6 hours (overnight is most appropriate).
4.Before you place again one’s contact lenses, wash each side with new mixture again.
Sadly, simply being industrious about cleaning one’s contact lenses daily is not adequate. So that to prevent infection and better eye’s health is maintained, it is imperative} that you carefully sterilize one’s contact lens cases on a regular schedule.
Sterilizing Your Contact Lens Holders
Sadly, contact lens cases may be a source of bacteria maturity and may conveniently lead to a disease. In order to problems will be avoided arising from micro organisms and bacteria transferring to one’s lenses from one’s lens cases, you must carefully disinfect one’s contact lenses on a regular basis.
There are several different suggested methods for correctly sterilizin contact lens cases.
1.Empty, clean and rinse one’s contact lens cases every some days. The cases must be cleaned with the chemical mixtures advised by the supplier of the lens case. If no such recommendation may be found on the box, test reaching the supplier’s customer care division to see what to suggest. While this method is pretty easy, it is not guarantee in sterilizing and destroying all microorganisms.
2.Many contact lens users suggest simply placing contact lens cases in the dishpan. The heat and thorough action from the dishpan’s mechanism is practically guaranteed to destroy any microorganism on one’s contact lenses.
3.A simpler method to sterilize youone’s contact lenses with burning sensation is to put one’s contact lens cases in a pot of boiling water in one’s kitchen for 5 to 10 minutes.
At all times, be clear that you is not only sterilizing the cases, and the caps too. Be precise and regular in one’s contact lens case sterilizing. If you don’t rely on oneself to do so, simply invest in some inexpensive cases and replace them often.
Read More...