Some Important Facts about Contact Lenses

One of the main reasons why people choose wearing contact lenses over eye glasses is because contact lenses are more comfortable.

Basically contact lenses are worn by people with bad eye sights to correct their visions; however a lot of people also wear them for cosmetic purposes- to look different. The nature of contact lens is that, it gives an easy and a virtually invisible solution for the wearer.

Why Contact Lenses?

Similar to eyeglasses, contact lenses correct refractive errors such as myopia (nearsightedness) and hyperopia (farsightedness). When people have these sorts of conditions with their eye, their vision cannot bear direct light on the retina like normal eyesight can do. When the eye is unable to focus the vision, then it leads to blurry vision. Contact lenses are manufactured in such a way that it is shaped as per the problems a person is facing with his vision. The perfect fit of the lens helps the eye focus the light directly on the retina.

As compared to eye glasses, contacts provide a closer visual similarity as the natural vision. They are designed to blend-in with the natural eye and aid the function of the eyes. Wearing contacts feel natural as the wearer can go all day without feeling uncomfortable or uneasy. Contacts stay in place and they do not move even if you blink because as soon as you put them on, they stick to the layer of your tear fluid which lies on the eye surface.

Corrective Contacts for myopia and hyperopia

Contact lenses refract light in order to let the light focus in the correct way upon the retina. They are shaped according to the types of visual problems. The refractive strength of the lens in correspondence to light is measured in Diopter. The power of the contact is determined by the unit measurement of Diopter.

When a person’s eyeball is longer than normal, it causes light rays to focus in front of the retina which results in myopia (nearsightedness). Contact for correcting myopia is thinner at the center than the edges to spread the light away from the center by moving forward the focal point of the light toward the retina.

Hyperopia (farsightedness) results when eyeballs are shorter than a normal eye, this makes the light rays to focus behind the retina. The lenses for hyperopia are thinner at the edges and thicker at the center. The lenses are designed to bend the light toward the center, by shifting the focal point back so that light can focus on the retina.

Prescription for Contact Lenses

You will need to visit an Optometrist for obtaining contact lens prescription. The doctor will perform a vision test and prescribe the right kind of corrective lens for correcting your vision. After which you can purchase the contacts from either an optical store or a certified internet stores.