What four groups of pathogens must contact lens disinfection solutions be effective against according to the FDA?

The correct answer highlights the essential groups of pathogens that contact lens disinfection solutions must be effective against, as stipulated by the FDA. Contact lens wear can increase the risk of serious eye infections, so it is crucial that disinfecting solutions target a broad spectrum of harmful microorganisms.

Bacteria, which encompass both gram-positive cocci and gram-negative rods, are the primary concern due to their prevalence on various surfaces and their potential to cause infections. Additionally, fungi, particularly yeasts, can also lead to serious ocular conditions if they contaminate contact lenses. Together, these microorganisms represent a significant threat to eye health.

While the other options may mention some relevant pathogens, they do not accurately capture the specific distinctions required by the FDA regarding the effectiveness of disinfection solutions across these broader categories. The inclusion of gram-positive cocci and gram-negative rods in option B emphasizes the necessity for solutions to be robust against different bacterial strains, which is essential for comprehensive lens safety and effective prevention of infections.