Contact lenses are designed to correct your vision, just in the same way as traditional eyeglasses do. They are made with a soft and flexible material, and lay upon the surface of the eye. As they float upon the natural layer of tears within the eye, many people who use contact lenses hardly notice they are wearing them.
Just as eyeglasses do, contact lenses help to compensate for the eyes refractive errors. Thus ensuring that the wearer can focus on an image properly with clear and sharp vision.
Contact Lenses for Those who are Short Sighted
• Short sightedness is also referred to as myopic vision. This means that your eye is focusing light in front of the retina. When you get your prescription from your eye care specialist you will notice the minus (-) symbol being used. The type of contact lens used for short sighted people is at its thinnest in the centre of the lens. This then moves the focal point of light backwards so that it reaches the retina.
Long Sighted Contact Lenses
• Also named hyperopic vision, long sightedness prescriptions have a plus (+) symbol. Those who are long sighted find that the light is more focused toward the back of the retina. Contact lenses for hyperopic vision are thinnest around the edges, thus bringing the lights focus forward.
• This is caused when the cornea is shaped like a rugby ball, rather a spherical ball as it should be. This causes light to bend unequally, creating two focal points. For those people with astigmatism a Toric contact lens is needed. These types of contact lens have different curvatures, bringing the light together into one single focal point for the light.
Contact Lenses for Presbyopia
• Presbyopia is a natural condition that occurs in some people as they age. It is caused by the lens of the eye hardening and thickening, so that their ability to focus decreases. In this instance, both near and far sight correction is needed. Therefore, your eye care specialist will recommend either bifocal or multifocal contact lenses.
• The type of contact lens that your eye care practitioner prescribes will depend on how the presbyopia is affecting you.
1. There are some contact lenses that have the near vision correction at the centre of the lens, with the distance correction surrounding it.
2. A type of bifocal contact lens with the distance correction and the top and the near at the bottom.
3. Or there is a contact lens that has both elements of correction near the centre of the lens.
Now that you know how contact lenses work, you know which type of lens you personally require following the prescription details given to you by your eye care practitioner. You could choose to purchase your contact lenses online in Australia. Offering an easy ordering process and speedy delivery to any address throughout Australia, you could have your new contact lenses within days. Taking advantage of the many discounts available when you order contact lenses online.