The sales of contact lenses are regulated in USA by Federal Trade Commission (FTC) and Food and Drug Administration (FDA). Nowadays, contact lens can be found in a very large variety of types such as colored, novelty, crazy, special effects, Halloween, theatrical, scary, costume, glow in the dark, mirrored, wild eyes, red, white, black and many others. But eve if you buy some kind of colored lenses, it is highly recommended that you get your contact lenses only from those manufacturers which are approved by FDA and FTC. As per a strategic survey today there are around 75 million contact lens users around the globe and US alone contributes for around 31 million.
If you are just looking for changing your eye color it`s advisable to opt for colored contact lenses. Both soft and rigid contact lenses can be used for bifocal correction. Disposable contact lenses often don`t come with instructions for cleaning and disinfecting so it is advisable to be clear with its usage instructions before opting for them. Contact lenses look simple but are often more complex than they appear to be.
Contact lenses are available in two general categories namely soft contact lenses and rigid contact lenses. Soft contact lenses provide excellent peripheral vision, easier to adjust and are much more comfortable than rigid contact lenses because they conform to eye by absorbing and holding the water. Today even extra thin soft contact lenses are available in the market and are specially designed for the people with sensitive eyes. Rigid gas permeable contact lenses take around weeks to get used with your eyes but are easier to handle and less likely to tear when compared to soft contact lenses. It is very important to see in that you won`t use the contact lenses after the expiry date.
When using planned-replacement contact lenses, the doctor works out a replacement schedule tailored to the needs of each patient. If the property of holding water increases the oxygen permeability of soft lenses, also it increases their fragility quotient as well.
The ability of soft contact lenses to hold water increases the oxygen permeability of soft contact lenses and there by increasing its fragility quotient. If you opt for using planned-replacement lenses, then a doctor works out a replacement schedule tailoring your needs. To ensure that your eyes are safe it is very important that you replace your contact lenses as per the schedule prescribed by the doctor.
You can find a lot of brand contact lens stores over the internet that offers a great discount for lenses that are sold on prescription as well as on non-prescription. However it is recommended to purchase products from manufacturers that are approved by FDA and FTC. Ensure that the contact lenses you ordered match your prescription exactly.
While placing order for contact lenses don`t forget to request the manufacturer for complete usage instruction guide. Always prefer for high quality products so that you`re at no risk. Find out how the manufacturer handles customer service calls, so that it`s easier for you clear out if you find any problems with the contact lenses you received.
Improper care and wear of contact lenses may lead to sight threatening infection called Acanthamoeba Keratitis. Be aware of the fact that extended wear contact lenses both the soft and the rigid contact lenses increases the risk of corneal ulcers which can cause infections and even may lead to blindness. Even the poorly fitted contact lenses can lead to eye sores, eye inflammation and eye abrasions.
While sleeping the binding down of rigid contact lenses reduces the flow of tears and oxygen to the cornea thereby opening the doors for eye infection. Whereas binding of soft extended wear contact lenses during sleeping has very little effect on the shape of the eye as they are porous and allow flow of tears. S distilled water contains microorganisms it is recommended to always use commercial sterile saline solutions for cleaning contact lenses.
With internet purchasing contact lenses has become very simpler and easier. But it is very important to keep in mind that buying poor quality products so as to cut down cost would ultimately lead to vision problems so it`s highly recommended to use quality products so as to ensure that your precious eyes are safer.