Eye drops are uniquely risky because the eye is an immune-privileged site.

This year has been marked by many terrifying things, but perhaps the most surprising of the 2023 horrors was … eye drops.

The seemingly innocuous teeny squeeze bottle made for alarming headlines numerous times during our current revolution around the sun, with lengthy lists of recalls, startling factory inspections, and ghastly reports of people developing near-untreatable bacterial infections, losing their eyes and vision, and dying.

Homeopathy is an 18th century pseudoscience that produces bogus remedies that work no better than a placebo and, if prepared improperly, can be toxic, even deadly. The practice relies on two false principles: the “law of similars,” aka “like cures like,” meaning a substance that causes a specific symptom in a healthy person can treat conditions and diseases that involve that same symptom, and the “law of infinitesimals,” which states that diluting the substance renders it more potent. As such, homeopathic products begin with toxic substances that are then extremely diluted—often into oblivion—in a ritualistic procedure. Some homeopaths hold that water molecules can have “memory.”