Can I order my color lenses with the prescription of my glasses?
You wear glasses and want to wear contact lenses or color lenses? You are wondering yourself if you can use your glasses prescription to find out your prescription ? Our professional optician Sarah Marlien answers to your questions in this post.
You may have already realized that the prescription of your left eye could be the same for your glasses and color lenses while your right eye had a different prescription. Is this an error? Well no !
To understand this difference, you can do a very simple test with your glasses. Keep them away from the normal position, you will realize that your eyesight is blurring... Your prescription and the centering of your glasses depend among other things on the distance glass-eye. Like when you have a magnifying glass in hand, there is only one distance which allows you to reach the ideal graying.
What's the connection: we're talking about lenses and not magnifying glasses or glasses? Precisely, your lens is placed directly on your eye and therefore has a glass-eye distance which is 0. The prescription of your color lenses is therefore recalculated with respect to this new parameter.
Let's take an example, if I have myopia (discover our color lenses for myopia) of -2.00, what about the prescription of my color lenses? Well I will wear the same prescription value. The same prescription is kept for glasses and color lenses up to two diopters. If one of your eyes therefore has a prescription less than or equal to -2.00 for your glasses, you can choose the same prescription for your lenses. On the other hand, if one of your eyes exceeds this prescroption, for example -2.50, you must take into account the glass-eye distance. The prescription of your color lenses will therefore be different from that of your glasses.
These are of course theoretical rules which allow the best estimated prescription to be optimized. Adaptation and testing of lenses with power is always necessary. In addition to checking your prescription for each eye, this will allow you to see whether, binocularly, you can withstand these prescription.
We recommend that you wear daily prescription color lenses (discover our Bella daily color lenses with prescription and our Solotica daily color lenses with prescription) to verify that the prescription of your left and right eyes really suit you. Testing your prescription with daily lenses will be less expensive than with annual lenses for example.
A special case: astigmatic people...
Just as wearing a color lenses directly over the eye plays a role in your prescription, so having your eye wet affects your prescription. Between the color lenses and the eye is the teardrop lens. This aqueous presence may be enough to compensate for a little astigmatism.
It is for this reason that you can read a figure in parenthesis on your prescription and not have it on your lens prescription (up to an astigmatism of -0.75). Depending on the value of astigmatism, we can set an average value for your prescription. This value will give greater freedom of accommodation.