image of woman doing an eye test.

At Vision Source of Warren, Dr. John Barnhart and our entire Warren optometry team are committed to providing advanced vision care in a professional and comfortable environment. As an optometrist in Warren, our primary eye care service includes a complete eye exam that analyzes eye health and vision function. In addition to eye exams and vision testing, Dr. Barnhart and our team of optometry professionals provide testing for glaucoma, cataracts and macular degeneration. Our Warren optometrist also offers glasses, contact lenses, and pre- and post-operative care

Eye Exams

Dr. Barnhart and the Vision Source of Warren team take even the most routine eye exams very seriously. During a yearly or bi-yearly examination, our Warren patients will receive a patient history review, a series of vision and eye tests, assessments of eye focusing and movement, and an eye health evaluation. Our optometrist will discuss any additional testing that may be required to diagnose an eye disease or condition. Call us a today at (330) 847-9093 to schedule an appointment.

Contact Lenses

Not sure that glasses are for you? Ask our Warren staff about contact lenses. Advances in the field of optometry have produced a variety of different types of contact lenses with a range of benefits. Rigid gas-permeable (RGP), daily-wear soft, extended-wear, extended-wear disposable, and planned replacement are the various types of contact lens options available today. Our Warren optometrist will discuss the various options with you to determine which type will best fit your needs and lifestyle. Schedule your examination today by calling (330) 847-9093. There are many advantages to consider when determining if contact lenses are right for you and our knowledgeable staff is here to answer any questions.


Laser assisted in situ keratomileusis, commonly referred to as LASIK, is a corrective alternative to glasses or contact lenses. Like glasses or contact lenses, LASIK is a method for treating refractive conditions including nearsightedness (myopia), farsightedness (hyperopia), and astigmatism. At Vision Source of Warren, Dr. Barnhart provides pre- and post-operative exams for LASIK and other eye procedures. Call (330) 847-9093 today to schedule an examination to see whether you are a candidate for LASIK.