How are contact lenses made? Mine always look like perfectly round little dishes of soft plastic.?
958981
Encyclopedia - Contact Lenses  \n\nWhen were contact lenses developed?\nWhat types of lenses are available?\n\n\nContact lenses are thin, finely crafted plastic discs designed to fit over the cornea (See Anatomy of the Eye) of the eye, usually to correct vision problems caused by refractive error. They are held in place by a natural layer of tears on the surface of the eye. In addition to their obvious cosmetic advantages over eyeglasses, contact lenses provide better peripheral vision and virtually eliminate the image distortion sometimes caused by eyeglasses. Contact lenses are now available for the correction of most vision problems caused by refractive defects of the eye including nearsightedness, farsightedness, astigmatism, and presbyopia. \n\nWhen were contact lenses developed?\nContact lenses were first described and sketched by Leonardo da Vinci in the early 1500s, and the first workable model - a 1/4-inch-long glass tube filled with water and containing a microscopic lens - was developed and used by Thomas Young in 1801. In 1887, a German glassblower produced the first see-through eye covering, and in 1888 two European researchers simultaneously reported using contact lenses to correct optical defects. \n\nIn 1929, Hungarian physician Dr. Joseph Dallos perfected a method of making molds from living eyes. This enabled the manufacture of lenses that, for the first time, conformed to the actual shape of the eye. William Feinbloom, a New York optometrist, made the first American contact lens and also introduced the use of plastic to the manufacturing process. Contact lenses were made an official part of the practice of optometry in 1945 when the American Optometric Association formally recognized contact lens fitting as an integral part of their profession. \n\nThe first soft contact lenses were developed in 1960, but weren't generally available to the public until 1971. Toric lenses for astigmatism were approved in 1978 and the first rigid gas permeable (RGP) lenses became available in 1979. The next decade saw many advances including the introduction of tinted lenses, bifocal lenses, daily wear soft lenses, disposable lenses, and extended wear RGP lenses. The 1990s saw more advances including disposable tinted lenses, daily disposable lenses and the first disposable lenses that included protection against ultraviolet sunrays. \n\nWhat types of lenses are available?\nContact lenses are generally categorized as "hard" lenses or "soft" lenses. As the name implies, hard contact lenses are manufactured from a rigid material, polymethylmethacrylate (PMMA). PMMA is a tough, clear material that was the original plastic used in the development of contact lenses. In modern hard lenses, PMMA is often combined with other plastics to increase the oxygen permeability. These are called rigid gas permeable (RGP) lenses. Soft contact lenses are made from a plastic hydrogel polymer, hydroxyethylmethacrylate (HEMA) and have a high water content. \n\nIn addition to being categorized as either "hard" or "soft," contact lenses may also be identified by their "wearing" characteristics (extended wear, daily wear, disposable, etc.) and according to the type of prescription (toric, aspheric, bifocal, etc.). The following descriptions are those generally used by the ophthalmic community in describing the various types of contacts lenses. \n\nDaily wear soft lenses\nThese lenses are made of flexible, soft plastics that allow oxygen to pass through to the eye. They are easy to get used to and comfortable to wear. Because they fit close to the eye and are more difficult to dislodge, they are often recommended for sports. They won't work to correct all vision problems and may not provide the sharp vision required by some wearers. They also require daily removal and cleaning. \n\nDisposable soft lenses\nDisposable soft lenses are normally worn for one or two weeks and then discarded. They are
290701
I had that happen to me once too, because I used them on top of my contact lenses, I never found out why it happened though....sorry
269870
Most goggles are made of plastic. The straps and eye cup gaskets are made up of rubber, latex, and/or silicone.
318212
I wear soft lenses, and I have FreshLook Colors in Blue, FreshLook Radiance in "Eden" which is a shimmery green, and FreshLook Color Blends in Green.  Each pair is supposed to last 30 days, however, my doctors told me that since I take good care of them, they can last up to a year.\n\nThe Blue ones look pretty fake on me, I have REALLY dark brown eyes.  The Color Blends in Green looks really good, and the Radiance in Eden is awesome because it's not really that noticeable.  It does give a slight hint of color, but it really just makes my eyes have a nice sparkle.\n\nFreshLook also has a line called Dimensions, which I think is meant only to enhance the color of blue or green eyes.
1077423
well the doctor is probably going to make a regular check up on your eyes to make sure they are ok and everything, and then he/she determines the size of your contact depending on the size of your iris...so then you try on a pair and he checks to see if they are the correct fit (my doctor uses this machine thing that gets really close to your eye, im not sure what it does exactly) and then the doctor or something else teaches you how to take care of the contacts and put them into your eye...
1001012
Some liquid to contact  on your lens. It's saline. Go for laser correction.
772053
The Truth:\n\nThe 2-Week contact lenses are EXACTLY the same as Daily Wear, which are EXACTLY the same as the ones you wear for a year.\n\nThe difference is only in the price and marketing.  I had a single pair, which I took out and soaked every night, and I wore them for a year, which is exactly what my opthalmologist said to do. One pair for one year, and everything was fine... They could have lasted longer, but the eyes change too much in a year.\n\nI now wear the "2-Week" contacts... which I thought meant you could wear them for 2 weeks non-stop....WRONG!   Well, wrong, according to my optometerist.  She says 2-Week contacts must still be taken out and soaked every night.  (I thought 'what's the point, I had to do that with my 1-Year contacts also)  She also says that you can actually get 4-6 weeks out of them...\n\nBut... I wear them for 1 or 2 weeks continuously, then let them soak for a week or 2, while I wear another pair, which I then take out and replace with the previous pair, back and forth.  I have had absolutely no problems using this method.  If I ever have any prolonged irritation or discomfort, I toss the offending pair out and use a fresh pair.  Just make sure you keep your cases clean and your solution fresh.\n\nI'm sure contact lens makers and optometrists would just have a fit and tell you how horrible the above method is, but they make lots of $$$$ selling you at a great price those tiny gels that cost them pennies to make.
1038945
If I remember correctly, the contacts that were recalled were the weird cosmetic ones that, for whatever reason, didn't require a prescription... they were the ones that had things like swirls and cats-eyes.\n\nTinted lenses from a big-name company that you buy from your optometrist are probably going to be fine.
315739
You have to have a decently dry finger, so that the lens doesnt stick to the finger.\n\nPut it on the end of your index finger, and put 1-2 drops of saline into the lens, this will allow it to have a "suction cup effect" to your eye.  Using your middle finger (on the same hand as the contact lens) and your other hand, hold your eye open and allow the lens to catch to your eye.  Blink a couple times to press out air bubbles, and to allow the contact lens to move into place.\n\nTo take out the contact lens, hold your eye open as you did putting it IN, and with your thumb and index finger, GENTLY pinch off the lens, it should pull off with just a little bit of force.  Hope this helps!!!  :)
825962
You just cant!!!\nIf you think of carrots??? No way!!! I think i have eaten 1 ton of carrots already and it still has no effect. I am using contacts all the time. If you have money..you can try lazer eye correction...but ifyou're poor like me, contacts will do miracles. It can even change the "color" of your eyes and its fun!!! I dont wear glasses.... people tend to look at me as nerd!!!
30713
Wearing contacts are a difficult adjustment for your eyes.  They must get used to a foreign body residing there.  Your doctor or optician likely recommended wearing them for short periods initially, working your way up to wearing them all day.  Have you been doing that?  If not, it could easily tire and irritate your eyes.  Giving your eyes some rest from the contacts may be enough to solve the problem.  Also, an over-the-counter eye care product may help as well.\n\nIf you are following their instructions and continue to have problems, you should probably return and have your eyes checked to make sure there are no other problems.
1133767
There isn't a solution for glasses and contacts besides surgery. \nGlasses were really annoying when I first got them 8 years ago, and they are still sometimes annoying..\nIn winters, the glasses get misty in winter when I go inside a building or when I try to drink tea/coffee (and when I am skiing..).\nOther than that, it's fine. I got used to it now, and it became part of me. In fact, it's more annoying to not be able to see anything than wearing glasses itself being annoying.\n\nDon't worry.. you will get used to it.
226686
If you Mean on plastic lenses you will find not much luck in that. The fix they sell just makes a half way fix and all it does is coats the plastic so no one can se the scatch you are looking through it still just rubs off the next time you clean it too.
792502
I wear hard contacts and always take them off before a shower as I was told many years ago.\n\nI only wear them for games.\n\nI don't know about soft contacts but it would probably be best to take them off.\n\nAsk an optometrist what they would recommend.
847649
Those should be fairly thick- unless there is some kind of special thin lense-my old glasses were a -6.00 and plastic-and fairly thick= D
510528
Hey, I tried to find lenses like that for ever, but never did.. I recommend getting a pair of contacts and dive with them\n\nas long as you dont blink too much or take of your mask they wont fall, I've been doing that for one year and have had no problems
310921
Actually, they're more similar than you might think.  Any contact lens has to be prescribed by an eye doctor because contacts are technically medical devices.  Contacts come in many different sizes and fits, so your eye doctor has to select a lens that fits your eye properly and lets enough oxygen through.  If your contacts don't fit you correctly, serious damage to your eyes can occur.  What you mean by cosmetic contacts is probably colored contacts that don't have any power (prescription) in them.  These can be fit and prescribed by your eye doctor as well.