Quick Research
Budget: $10 – $30 USD
Please research the incidence rate in the United States for each of these diseases (the incidence rate is how many people are suffering from the disease):
https://www.aao.org/eye-health/tips-prevention/surprising-health-conditions-eye-exam-detects
https://www.aao.org/eye-health/tips-prevention/surprising-health-conditions-eye-exam-detects