How do I read my contact lens prescription?
A prescription usually includes a base curve, diameter, and power (sphere). The prescription for your left and right eye may differ and for this reason, you'll find them written separately. If you have astigmatism, you'll find additional figures for cylinder and axis. Those with presbyopia will addition and dominant figures on their prescription.
You'll also find the name of your contact lenses and the expiry date on your prescription.
In some instances, you'll also find how often to replace your lenses written on your prescription; for example, it may say whether they are daily, weekly, monthly etc.
If you're choosing coloured contact lenses, you'll also find this information written on your prescription.
Below are some examples of how your prescription may be written: