A standard eye chart begins with large letters on the top line that gradually get smaller on each of the following lines. The eye chart in Dr. Spalding's office has the same size letters on all five lines.
Halfway into the episode, Dr. Pat crosses the street heading toward her office. You can see the shadow of the camera crew following her across the street.
About 35:13 in front of the Bates house just after the Virginian leaves and the camera pans out on Dr. Pat you can see the ankle and boot of someone on the right side of the screen.