This doctor is excellent. I have gone to him for 7 years now. He is thorough to the point of ridiculous. You always wait in his office, but he is worth it. He is not trying to sell you glasses or anything else. He tells you to go to Costco for eyeglasses and contacts.
My husband recently was diagnosed with shingles and it went into his eyes. Dr. Zwerling was fanatastic-saw him daily for several days. Even called him from his vacation in Ireland to check on him.