Section 351.454 - Contagious or Infectious Disease(a) An optometrist or therapeutic optometrist may not practice optometry or therapeutic optometry while knowingly suffering from a contagious or infectious disease, as defined by the Texas Department of Health, if the disease is one that could reasonably be transmitted in the normal performance of optometry or therapeutic optometry.(b) The board by rule shall adopt guidelines that define, according to guidelines issued by the Texas Department of Health and specific to the practice of optometry or therapeutic optometry, each disease or type of disease that could reasonably be transmitted in the normal performance of optometry or therapeutic optometry. Acts 1999, 76th Leg., ch. 388, Sec. 1, eff. 9/1/1999.