The prescription should unfold in the following way.
Prescription contact lens power chart.
Say you have this glasses prescription and want to convert it to contact lenses.
Perceived lens power 6 25 1 0 014 6 25 5 75.
If you are using your glasses prescription to order contact lenses online you may be ordering the wrong power in your contacts which can lead to blurred vision eyestrain and headaches.
Name expiry date.
Find the number on the glasses prescription in the middle column.
Reading the contact lens power.
Acuvue oasys and an expiry date which is usually a year from the date of your check up.
Vertex distance convsersion chart for converting eyeglass prescription to contact lens.
Contact lens manufacturers make lenses in 0 25 d power increments.
Sphere power is positive if you are farsighted and negative if you are nearsighted.
In charts like these the middle columns the pink column in the chart above is the power the corresponds to the glasses.
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Below is an example of the prescription listed on the side of the box for 1 day acuvue moist for astigmatism.
It is very important when ordering contact lenses online to do so using a contact lens prescription.
The unit of measure for sphere power is a dioptor or d.
A contact lens prescription provides additional information about the size of the lens not just information about the power and the power will also be different because while a contact lens sits directly on the surface of the eye eyeglasses sit about 12mm in front of it.
On the contact lens box read the prescription information from left to right.
Or we can simply refer to the vertex distance conversion chart.
The eye column will contain either od os or ou which mean right eye left eye or both eyes respectively.
Your prescription should also contain the name of your contact lens e g.
Typically a contact prescription contains a brand name lens base curve lens diameter and lens power so you can easily order the right corrective lenses.
The equivalent contact lens power is.
The columns on either side blue and green represent the equivalent power of contact lenses.
Please be aware that a contact lens prescription is different to a glasses prescription so you cannot.
You could use the formula.