I went there to get a prescription for glasses I could order on the internet. I told his assistant Diana that when I came in to the exam room, she did not comment. When the doctor came in I told him the same thing. he did not say they don't write prescriptions for glasses on the internet. A couple of days later I went online to order glasses, there was a couple of things missing on the prescription for the glasses. I called Dr. Johnston's office and ask the his assistant for the missing numbers, she said they didn't supply that info. I did the measurements I needed for the glasses and ordered them, When the glasses came. the prescription was really off. It hurt my eyes to wear them and now every time I am in the sun and go inside some place. I am blinded. He squirted something in my eyes when I was there and it ruined my eyes. I ask them for at least a refund of my money and they would not give it back to me.