Which material would be the most problematic in an ocular foreign body?

Which material would be the most problematic in an ocular foreign body?

• A. Glass
• B. Stone
• C. Copper
• D. Plastic

Answer: (C)

When a foreign body is lodged in the eye, the risk isn’t just mechanical injury but also chemical toxicity from the material. Copper stands out because it slowly releases copper ions into ocular tissues, causing ongoing damage. This leads to chalcosis bulbi, a progressive toxic reaction that can affect the cornea, lens, retina, and other structures, potentially resulting in vision loss if the piece isn’t removed. The toxicity is the key issue here, not just physical irritation.

In contrast, inert materials like glass, stone, and plastic don’t chemically injure ocular tissues in the same way. They can cause mechanical irritation or damage from the initial injury, but they don’t produce the same dangerous, ongoing chemical reaction that copper does, making copper the most problematic choice.