A valid prescription is necessary when ordering contact lenses online. The definition for a valid prescription varies from state to state but most states require the prescription be written within 1-2 years of when it is filled. Some of the important information included on a contact lens prescription includes:

• Patient name

• Date of eye exam

• Contact information for eye care professional who wrote the prescription

• Power of the prescribed lenses

• Material or manufacturer of the prescribed lenses

• Base curve

• Diameter

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