Answer: Dr. Ferris claimed that he couldn't read a thing without his glasses. Yet he could read the hours open sign perfectly. What really clinched Melly's suspicions was the fact that Zoe Ferris was 8 years old. Dr. Ferris bought Aspirin for her leg injury. Children under the age of 18 aren't supposed to have Aspirin, as it can cause Reye's Syndrome. Surely a doctor with several years of experience would know this.