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Welcome to Marilyn K Kosier M.D., Inc.
Your Ophthalmologist in Lancaster, OH.

Call us at 740-654-8424 today.

Dr. Marilyn Kosier and her highly skilled team welcome you. As an ophthalmologist, Dr. Kosier is a medical doctor who specializes in the health of your eyes. Dr. Kosier’s extensive training equips the ophthalmologist to provide a wide array of vision services for you, from prescribing eyeglasses to performing surgery and diagnosing and treating eye diseases. Please browse our website to learn more about our staff and services.

Our Approach to Ophthalmology

At Marilyn K Kosier M.D., Inc., we stress empathy and communication. Our team will keep you comfortable and thoroughly explain procedures and treatment options. We welcome questions and strive to make patients feel at home. This personal care and individualized attention is why people throughout the area come to Marilyn K Kosier M.D., Inc. for all their vision health needs. We are happy to discuss financing options and work with your insurance provider to keep your care affordable.

Our office offers many eye care services, from surgery to treatment of eye diseases. Talk to us about cataract surgery or glaucoma treatment. If you’re diabetic, we’d love to help you manage your eye care. We can treat your corneal or vitreoretinal disorders.

Whatever your eye issues, we’re here to help. Call us today at 740-654-8424, so we can help you improve your vision. We look forward to having you join our roster of satisfied patients who see the world through healthy eyes.

Dr. Marilyn Kosier
Lancaster Ophthalmologist | Marilyn K Kosier M.D., Inc. | 740-654-8424

1520 Sheridan Dr.
Lancaster, OH 43130-1303


Find Us On a Map

Office Hours


7:30 am-4:00 pm


7:30 am-4:00 pm


7:30 am-4:00 pm


7:30 am-4:00 pm


7:30 am-1:00 pm





  • "At our office we offer comprehensvie eye exams. Dr. Kosier does eye evaluations for Diabetes, Glaucoma, Cataracts, Macular Degeneration, Dry Eye, Eye Lids, and much more. Please call our office to schedule an exam. We look forward to meeting you."