How to Insert and Remove Contact Lenses

Getting used to inserting and removing contact lenses requires patience and practice until the process can be easily mastered. Initially, you will have the opportunity to both insert and remove your contact lenses whilst having them fitted at your opticians. However, when faced with this task without the support of the optician and his staff, the process may seem, at first, a little difficult but can be overcome if you persist.

When attempting to insert your contacts for the first time you may become frustrated as it can take a certain knack to be successful. In spite of your initial failures it is important to persevere and you will find that with each attempt the whole procedure will become easier and easier. Remember that very few are able to master the art of inserting and removing their contact lenses immediately so try to relax and be patient. To help you get started the information below should help as it contains some tried and tested ways to make life easier for you in this respect.

The first thing to remember before attempting to insert contact lenses is that your hands should be scrupulously clean and dry. You should then place the contact lens on the tip of your index finger in a concave position. Apply a little solution to the middle part of the contact lens. Using your thumb, pull down the lower lid of the eye into which you will be inserting you contact lens and look up.

You are now in a position to insert your contact lens that is sitting on the tip of your index finger. Avoid the impulse to blink but allow the contact lens to adjust to the eye, after a few seconds you may close your eye and your contact lens should feel secure and comfortable. If not, repeat the process until you are happy with the way the contact lens feels in your eye.

Removing contact lenses requires the same dedication to hygiene, so it is important to make sure that your hands are clean and dry. Remove the contact lens by using your thumb and forefinger, grab the sides of the lens and remove from the eye. This procedure can usually be accomplished instantly but also requires a degree of practice. To help lubricate your eyes and assist the process it may help to apply some eye drops.

After a few weeks you will find that inserting and removing your contact lenses has become easy and you shouldn't experience any difficulties. It is simply a matter of technique. Once you get the hang of it you will begin to enjoy the benefits that contact lenses offer as they are certainly a wonderful aid to correcting your vision.

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How Contact Lenses Were Invented

When it comes to vision, history has been full of visionaries. Many people think contact lenses are a 20th century invention. In fact, people have been trying to find a way to ditch their glasses for centuries. Leonardo da Vinci had the idea in the 1500s. As he did with so many of his ideas, he made sketches of corrective lenses that would fit directly over a person's eye.

More than 130 years later in the 1600s, Rene Descartes wrote a book called Dioptric in which he explained his idea for a corneal contact lens. Later in the same century, Philippe de la Hire did some drawings of concave lenses placed on the eye.

However, it wasn't until 1801 that somebody actually put these ideas into practice. Working from the writings of Descartes, 28-year old English doctor and all-around genius Thomas Young created the first corneal contact lens and tried it in his own eye.

In the late 1800s, a German glassblower created the first glass contact lens. He fitted German soldiers with them during WWII because Nazi soldiers were not allowed to wear glasses. After the war, the demand for contact lenses grew around the world. Plastic became the new material of choice rather than glass.

From the post-war period, contact lens development really took off. Hard lenses were sold commercially beginning in the 1940s. In the early 1970s, the first soft contact lenses were put on the market by Bausch & Lomb.

For the next 30 years, there was an explosion in the popularity of contact lenses. Today, we can buy disposable lenses, colored lenses, and lenses with UV filters in them. It remains to be seen what developments in contact lenses and vision correction will occur in the 21st century. Will we all throw away our lenses in favor of laser eye surgery one day? Will something entirely different be developed to improve vision? Perhaps there is a modern-day Leonardo Da Vinci sketching his ideas for a new way of seeing.

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Gopro wide hd out of focus underwater

The refractive index and the spherical shape of air inside the housing of go pro hd wide combined with the water high refractive index causes a bi-concave lens effect in water blurring the image. It can be fixed with a flat front lens cover but the border could be visible in 170 wide angle.

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Concave lens - physics experiment

www.fizik.si Lens that possesses at least one surface that curves inwards. It is a diverging lens, spreading out those light rays that have been refracted through it. A concave lens is thinner at its centre than at its edges, and is used to correct short-sightedness (myopia).

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