Showing posts with label Lenses. Show all posts
Showing posts with label Lenses. Show all posts

Friday, February 17, 2012

Pros and Cons Of Photochromic Lenses

Contact Lenses Contact Lenses

Transition Lenses

Contact Lenses

Transitions is actually a brand name of a Photocromic Lens. Although transitions are probably the most advanced photochromic lens on the market there are many others out there.

People call Photochromic lenses by all different kinds of names such as Transitions, Reactolite, Reactions and I've even heard them called Graduations. However, they are all Photo chromic lenses.

Photochromic lenses are clear lenses that react with UV and produce a tint effect based on the amount of UV present.

When wearing Photochromic lenses even a dull day some reaction will occur producing a very pale tint and then on a very bright day where more UV is present they will turn quite dark. When wearing them indoors they will become clear.

The idea behind photochromic lenses is that they will provide the correct amount of protection for the varying light conditions you experience. However, when driving, your car windscreen will block a certain amount of UV which is required to make the lens react so they will not work as well as they would outside of the car.

The Two Most Common Photocromic Lenses

Transitions Lenses

Transitions are available in Standard Plastic, Poly Carbonate, 1.6 and 1.67 Lenses. They are the fastest reacting lens on the market and will react into sunglasses within 30 seconds. However, they will take longer than that to go clear again when you go inside.

Reactolite Lenses

Reactolite is a brand name given to a Glass photochromic lens. They do not react as well as the transitions and are much heavier to wear. However, one good thing about glass reactolite is that they work much better behind a car windscreen than the transitions do. (If only we could have the best of both worlds.)

In most cases the Transitions lens is the preferred option due to the over all comfort and performance.

Photocromic lenses are ideal in the sense that they can save you having to purchase two pairs of glasses ie, Clear glasses and a pair of Sunglasses. However, many people who wear transitions also have a cheaper tinted pair just to use in the car.

Pros and Cons Of Photochromic Lenses

Wednesday, February 15, 2012

Cheap Colored Contact Lenses

Contact Lenses Contact Lenses

Colored contact lenses are exactly like regular contacts, but they give the illusion of a new eye color. Colored contact lenses come at cheap rates, yet in wide ranges. They can be discarded after using for a week or two. Also, one can change color combinations in accordance with the outfit and occasions.

Contact Lenses

Cosmetic Fresh look contact lenses that change eye color are on sale for .95 a pair. For even greater savings, there are packages for festive occasions. Purchase three pairs or more and you will receive two free pairs, for a savings of .90. There are other handy price combinations as well. These contact lenses can be of the same color, or different. With each order, the dealers offer a sample colored contact lens for trial purposes.

Colors and color blends are designed to change even the darkest eye color. Opaque lenses can block the natural color of the eyes. They are designed to enhance or add color to light-colored eyes. For the lowest price, one can purchase Wild Eyes contact lenses around Halloween. These special-effect lenses usually go on sale at that time of the year. They are very comfortable to wear. These novelty lenses come in a variety of crazy designs such as white, black, red, vampire, and cat eyes for those special effects or a theatrical costume.

Make-up suggestions are also available with dealers. Depending on the skin tones and the color of the contact lenses, these make-up suggestions will enhance one's look. However, cheap lenses might not meet the quality requirements of the user.

Cheap Colored Contact Lenses

Monday, February 13, 2012

Contact Lenses - Tips and Tricks for First Time Users

Contact Lenses Contact Lenses

It's quite common for people to avoid getting contact glasses or lenses because they are unsure of how to put them in... or even that they will be able to deal with having something in their eyes every day. However, contacts are really quite easy to use, once you get the hang of it. The first couple of times, you may be hesitant, but this article will show you how to put your new contact lenses in and how to ensure that they don't bother you.

Contact Lenses

To make sure that your contact glasses don't have calcium build up that could irritate your eyes, you'll want to soak them in lens cleaning solution for at least 4-6 hours. This will loosen up anything that has built up during the time they have been in the package. After the soak time, rinse your contacts thoroughly with saline solution (NOT tap water) and check them for any scratches or tears. Then you're ready to put them in.

You should wash your hands with soap and water before handling your contact glasses. This just ensures that no dirt or grime will get trapped under the lens where it can irritate your eye. Also, dry your hands carefully, since a wet fingertip will tend to stick to the contact, making it harder to insert.

Once you have prepared everything and your hands and contact glasses are nice and clean, you are ready to get started. Take the first contact lens and place it on your fingertip. It should look like a little bowl sitting there, with the top edges horizontal. Soft contacts can get turned inside out by accident sometimes and if this happens, you'll notice that the edges flare out. Just turn it right side out and it will be fine.

The easiest way to put your contact glasses in is to place the contact lens on the index finger of the hand closest to your eye, left hand for left side, etc. Use the middle finger of that same hand to pull the lower eyelid down and the opposite hand to lift the upper lid. Basically, you want your eye open as much as possible, you should be able to see the entire colored part of your eye.

Now, place the contact gently in the eye, making sure that it doesn't stick to your finger and let go of your eyelids. Blink a few times and the contact will automatically center itself. You should be fairly comfortable at this point. But, to make sure that you don't have any problems, you'll want to make sure that you don't wear your new contacts for very long the first few times, since they can be drying to the eyes.

Following the recommended time schedule for wearing your contact glasses is definitely a good idea, but you might want to use some lubricating eye drops (ask your eye doctor for recommendations) to help ease any discomfort. It's normal to have slightly irritated eyes the first few times that you wear contacts. You might find that your eyes tear up and get a bit red, but that's normal. However, pain is not, so if you have any pain, just take them out.

Trying out contact lenses for the first time can be a bit nerve-wracking, but it will get easier. Within a week, you'll be a complete expert at putting your contacts in and taking them out!

Contact Lenses - Tips and Tricks for First Time Users

Friday, February 10, 2012

Contact Lenses - The 3 Types of Multifocal Lens Available

Contact Lenses Contact Lenses

Normal contact lenses are fantastic for people who only need one prescription. However, for those who suffer from compound eyesight issues, more than one type of lens may be required. Traditionally, these people have had to use bifocal or varifocal glasses, but now there is a range of multifocal contacts available which give these people even more options.

Contact Lenses

1. Concentric Lenses

This design has the two different prescriptions placed so that one surrounds the other one. Usually, the near-distance prescription is placed at the center, while the far one is placed around the outside. This is the most common type, and is generally preferred because it provides excellent vision at a cost not much above a normal lens.

2. Simultaneous Contact Lenses

With this type of lens, both the near and far prescriptions are placed on top of each other. Although this may sound like they will counteract one another, it actually makes use of a fascinating property of the brain, in that it can select which image it chooses to focus on at a given time. The benefit of this lens over a concentric design is that is allows the wearer to see perfectly in a wider area.

3. Altering Contacts

Finally, this type of contact acts much like a bifocal glasses lens, in that the prescription is different at the top and bottom. Because of this, it is essential that the lens is placed the right way round on the eye. This type is becoming less popular as the other two types become more common.

Multifocal contact lenses offer a even bigger choice to those with poor eyesight. They are becoming increasingly popular, and as such prices continue to fall, making these lenses an excellent choice for your long term eye care.

Contact Lenses - The 3 Types of Multifocal Lens Available