Non-prescription contacts can be obtained through many retailers, both online and in physical locations. These lenses are typically used to change a person's eye color or for special effects. While all reputable contact lens companies sell lenses that are uniformly safe, there may be some differences between brands in terms of comfort. The primary factor to consider when choosing the best non-prescription contacts is the design of the lens and how the design will look when the contact is worn.
For most people, non-prescription contacts are used to change the color of the iris of the eye. There are some contact lenses, called scleral lenses, made to cover the white of the eye as well. Some cosmetic lenses are entirely opaque, while others allow some natural color to show through. While neither strategy is necessarily superior, covering dark eyes with light colors only works using almost entirely opaque lenses.
It can be difficult to gauge how contacts will look on different people. Often, the lens may look as though it is floating above the eye if it does not blend well. Trying on the lenses can help determine which are the best.
One of the most important features to consider when purchasing non-prescription contacts for cosmetic purposes is the design of the iris. Naturally, the human iris is not a single ring of color, but is variegated and has a darker ring around the edge. Many cosmetic lenses, particularly those made cheaply, give only a rough approximation of what the iris should look like. The best non-prescription contacts carefully paint an image of the variegated colors of the eye.
When choosing non-prescription contacts for special effects or events, you should consider how well the contacts fit the effect needed. If you are choosing, for example, contact lenses in a sports team's colors, it might be acceptable to choose cheap contacts without much detail. On the other hand, contacts for a movie set must be extremely detailed if they are to be at all realistic. The purpose of the lenses has a large impact on which lenses are the best.
Like prescription lenses, non-prescription lenses are made for different durations of use. Some colored contact lenses are made for single use, while others can be worn for long periods of time. Scleral lenses, while not prescription, often must be fitted to the eye of the intended wearer and cannot be interchanged. It is important to make sure that the lenses fit and can be used safely in order to minimize the possibility of damage to the eye.