| Contact Lenses 101: Power |
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Power in Contacts PrescriptionThe power aspect of a contact lens prescription refers to the corrective power required to allow the eye see as clearly and as far as possible. This power is measured for each eye and is common to be different for each eye in the same patient. The power in contact lenses is measured in dioptres which equates to the amount of compensation needed by each eye to optimally correct the vision problem. The dioptres scale ranges from -20.00 to +20.00 in increments of .25 so a prescription for a nearsighted person might be -3.50 for the left eye and -3.75 eye. If you are trying to order vision correcting contact lenses online without a prescription and don't have a slightly expired prescription or old contact lens package you should not be ordering anything and should schedule an eye exam with your Doctor and obtain a valid and current prescription for contacts.
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Contacts 101 Contact Lenses 101: Power