The Past And Future Of Contact Lenses
by: Mary Williams
Have you ever wondered about the history of contact lens? How have they been invented? And how do contacts correct vision?
Your vision depends on light beams hitting the retina (the back of your eyeball) at the same point. When the light does not meet at the same point, vision becomes blurred.
To correct this vision problem a lens needs to be placed in front of the eye to compensate. The lens then becomes a 'perfect' eye and light beams converge together at the retina.
Even though eye glasses have long provided the needed correction for vision problems, contact lenses were a marvel of science allowing individuals the freedom to forgo the hassle of slipping, fogging and distracting eye glasses. The inside surface of the contact lens is fitted to the shape of your eye so it stays in place. The outer surface is shaped to the corrected curve (as in eye glasses).
Originally, these contacts were made of hard plastic that required saline solution drops on a regular basis to keep moist. They were also prone to 'popping' out and causing discomfort when blinking. Newer contacts are made from a soft plastic that allows the eye to 'breathe'. They are much more comfortable to wear and because of the high water content of the material they require less maintenance during use. Soft contacts cling to the layer of tears covering the cornea and move slightly with each blink. This ensures that the eye stays moist and foreign materials can be safely washed out.
Basically, the purposes of contact lenses are to correct common vision problems like short-sightedness (myopia - when a person can focus on objects close to them but not far away) and far-sightedness (hyperopia - where the individual can see well at a distance but has trouble focusing clearly on print and other close objects). Now even individuals with astigmatism (where the shape of the cornea is elongated) or presbyopia (an age related condition that used to require bi-focals) can find contact lenses to suit their unique needs.
Currently, contacts are now developed in a disposable variety that means no cleaning is required. There are also contacts that can be worn for a week or even a month without being removed and cleaned - great for those who hate the daily hassle.
Many contact lens wearers are experimenting with changing the color of their eyes. While older versions produced harsh colors, new versions of color contacts (which can even be worn by individuals who have no vision problems) can be found in subtle shades and can even change dark eyes to light.
The contacts will be improved in the future. There is even talk of contacts created to prevent conditions like myopia from developing in children. Whatever happens, those with vision problems can count on new solutions being added to the currently available options all the time.
About The Author
Mary Williams is the owner of http://www.lasiksecrets.info, http://www.lasiknow.info, and http://www.lasikdoctorsecrets.info. If you need more information related to Lasik issues, please visit her websites.
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Slim Vision: Everything You Need to Know About Compact Reading Glasses
Slim Vision: Everything You Need to Know About Compact Reading Glasses
by: Steve Cogger
Compact reading glasses, sometimes referred to as slim reading glasses, are lighter, less noticeable, and sometimes more attractive, than the larger variety. Before purchasing compact reading glasses you should make sure that the readers will meet your needs.
First consider what you will be using the reading glasses for. Compact reading glasses are great for short tasks or those that must be performed while on the go. Reading menus and labels, shopping tags or bus schedules are perfect examples of these types of tasks. Because
the lenses on compact reading glasses are smaller than those on larger styles they don’t always make the best option for long term or more intense reading. Some people find it hard to focus through the small area for long periods of time.
Another great use for compact reading glasses is as a half eye....
Slim Vision: Everything You Need to Know About Compact Reading Glasses
Contact lenses > Slim Vision: Everything You Need to Know About Compact Reading Glasses
Wildlife Photography In Africa
Wildlife Photography In Africa
by: Dries Cronje
Africa has always been known as one of the best destinations for wildlife photography, or nature photography in general. All serious professional wildlife photographers have quite a portion of their file filled with photos from Africa. Why is this? It is because Africa presents you with opportunities for wildlife photography like no other place in the world.
Abundant wildlife
Africa?s wildlife is legendary. There are countless beautiful species, each unique. These species can still be seen in vast areas of their natural habitat, all over Africa. In some places, natural migrations that cover thousands of kilometers still take place unhampered by human civilization. You will not find this rich diversity anywhere else in the world.
Some of the species make such a brutal and captivating living, preying off other species that they get admired by every naturalist. Who would not like to see...
Wildlife Photography In Africa
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Contact Existing Customers To Increase Business Sales
Contact Existing Customers To Increase Business Sales
by: Abe Cherian
One of the best ways to increase your sales and one that won't cost you a lot or take a huge amount of time is by selling more to your existing customers. This can be a lengthy process and expensive to win over a new customer. between advertising, sales calls, and approvals. With existing customers the process can be much quicker, smoother, and less costly.
Existing customers already know you and what you can do. Your challenge is to learn about additional opportunities within your company, and go after them.
If the cost of sale for an existing customer is so much lower than for a new customer, why don't small companies go after their existing customers more aggressively?
Because they have been conditioned to grow their customer list, and because they simply may not realize the potential that exists in obtaining repeat sales from existing customers.
Bringing...
Contact Existing Customers To Increase Business Sales
Contact lenses > Contact Existing Customers To Increase Business Sales
How Do Colored Contact Lenses Work?
How Do Colored Contact Lenses Work?
by: Steve Cogger
The ability to change your eye color simply by
putting on a contact lens is becoming more popular
every day. Many people like them for fun and never
really care how colored contact lenses work. If
you are a little more inquisitive, read on and I
will tell you exactly how colored contact lenses
work.
The concept of colored contact lenses is to cover
the iris with a new color. In general, neat
colored contact lenses come in two varieties;
opaque colors and enhancement tints. Both designs
work well depending on the iris color they are
covering. One amazing feature of colored lenses is
that they never look exactly the same on one
person as they do on another.
Opaque lenses are intended to change an eye’s
color entirely. Opaque lenses can be used to
change a green eye blue or brown eye green. They
usually have a clear pupil opening...
How Do Colored Contact Lenses Work?
Contact lenses > How Do Colored Contact Lenses Work?
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