There are different kinds of contact lenses in the market. In fact, some lenses are believed to have the capacity of curing eye disorders other than poor vision. Hence, it is essential to understand the benefit and drawbacks of these contemporary tools. The modern contacts are made of soft lenses produced from water-containing plastics and gas permeable non-flexible varieties. These can also be grouped according to wearing schedule.
Hard Plastic Material
Contact lenses are made of a hard plastic described as Poly (methyl methacrylate) which is also the same plastic material used to make translucent acrylic plastic. However, hard lenses do not have the capacity to absorb water required to help oxygen pass through the lens and into the cornea. Hard lenses can cause the wearer a lot of tenderness and discomfort since the eye needs oxygen to stay healthy. The positive aspect of these lenses is the efficacy of cleaning since these are not easily affected by bacteria.
Soft contact lenses are more elastic and easier to wear than hard lenses. These are made of soft, plastic which are hydrophilic and capable of absorbing water. Oxygen can be transferred to the eye making the lens adaptable and more comfortable to wear. When a large volume of oxygen reaches the eye, this indicates that you can wear soft contact lenses longer with less chance of irritation. While contact lenses are comparatively safe, these can still lead to minor issues like discomfort, rosiness or tearing. In certain conditions, extended-wear lenses can cause infections like corneal ulcer which can lead to permanent vision damage.
You can order contact lenses online but there are certain things to consider before making any purchase. If you have used these eye implements before, it is practical to order the first set from an ophthalmologist. It may be more expensive than online means. Nonetheless, you can ask a professional to teach you how to put these on, make sure about the fit and show you how to take care of the lenses. If you have been using contacts before, you have to get the same variety of devices online. Spend time to compare brands, features, benefits and prices. Although online products are less expensive, there may be local outlets with fair discounts. These can even be better than online options. Your insurance may even cover contact lenses from exclusive vendors. Do not forget taxes and shipping costs when you make comparison of costs.
Many online retailers provide free shipping, but make sure that these are quality commodities. There are cheap contact lenses online. These outlets promote a good number of items, different costs, and varied shipping options. Some shops may offer a discount if you order a full year's supply in one order. There are suppliers who offer free shipping in limited areas. Ordering through these dealers will provide you definite advantages. Just make sure to be discerning and study all the terms carefully. It pays to be meticulous so you get the best incentives from online suppliers.