A laser pointer will not damage a security camera. However, to disable it, one must have the power and precision needed to hit their target precisely head-on 5 meters (16 feet).
A typical eye infection is easy enough for most people with everyday ailments but difficult if you’re already sick or elderly because this type of disease requires medication that may interact poorly with other medicines, we regularly take such as beta-blockers, blood thinners/anticoagulants, etc., so before starting anything new consult your doctor especially when dealing remotely via internet forums!