In relation to health indicators - nearsightedness or farsightedness - the lens will be selected taking into account the peculiarities of evidence of your eyes.
And with regard to the change of eye color landmark can be only one - your wish. However, given the fact that the human eye "organ" is very delicate and requires a special approach, the choice of lenses note several important points.
Do not buy lenses via the Internet. Find in your city Salon vision correction and contact lenses with a good reputation, modern medical equipment and to provide not only the possibility of buying the lenses, but also consultation ophthalmologist, and a wide variety of products for the care of the lenses.
Check with your doctor whether you can wear contact lenses, or is it not desirable. If medical records are normal, proceed to the choice of colors.
Colored lenses can dramatically change eye color or just add natural color brightness. In its structure, they are translucent and opaque.
Translucent lens is added to the natural color of paint and no more. They do not cover the full pupil, and through the lens will look through your own color. Therefore, it is impossible to make brown eyes blue by using translucent lenses - brown color will still be visible. But if you have blue eyes, you can enhance their color translucent lens a bright blue color. And it will not cause unnatural impression.
Translucent lenses can cause discomfort when a sudden transition from light to shadow and vice versa. This is especially important for those who spend much time behind the wheel.
Opaque lenses completely cover the pupil and can radically change the native eye color. Simply change the light color in the dark.
Then what kind of lenses you more fit, can also suggest an ophthalmologist. Listen to his advice - lens blocks access of oxygen to the eye, and he stops breathing. This is bad and can cause complications and eye irritation.
So do not wear lenses for many hours, especially if you do not require a medical condition.
Make it a rule to help the eyes with drops, gels and eye vitamins - take care not only about beauty, but also for the health of your eyes.