Comprehensive eye exam for glasses

Annual eye exams are an important part of preventative care to assess your eyes, vision and overall health. A comprehensive eye exam performed by an optometrist includes checking visual acuity, a refraction to determine your eyewear prescription and a complete ocular health check including a dilated eye exam.

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Contact Lens Evaluation 

A contact lens evaluation is a separate part of the routine eye exam and must be done annually, regardless if the prescription itself has changed or not. A contact lens evaluation fee covers determining a proper fitting lens, based on the corneal fit, refractive error and patient needs. The doctor will also perform a contact lens fitting to see which contact lenses fit well and best suit your needs. According to the Federal Trade Commission, patients are required to present a valid contact lens prescription in order to purchase contact lenses from any seller.
https://www.ftc.gov/tips-advice/business-center/guidance/contact-lens-rule-guide-prescribers-sellers
https://www.aoa.org/healthy-eyes/vision-and-vision-correction/healthy-vision-and-contact-lenses?sso=y