lens

1. A curved glass used to bring together or spread rays of light. 2. The transparent organ lying behind the iris and pupil that focuses light on the retina of the eye.

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Last Updated

October 7, 2025

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Breech baby
What Can I Do if My Baby is Breech?
Right before birth, most babies are in a headfirst position in the mother’s uterus. Sometimes, the baby is in a bottom-first (or feet-first) position. This is called a breech birth or breech ...
Bottles of otc pain relievers including ibuprofen, aspirin, and acetaminophen in a medicine cabinet
Pain Relievers: Understanding Your OTC Options
Over-the-counter (OTC) pain relievers are medicines you can buy at a store, without a prescription from your doctor. They can decrease or stop pain. They can also lower fevers. But not all pain rel...
Cleaning supplies stored in a cabinet.
Injury Prevention: Properly Storing Cleaning Supplies
According to the National Capital Poison Center, household cleaning supplies—including kitchen cleaners and liquid laundry packets—are the second most common exposure to poison among children under...