The FDA has approved Apple's sleep apnea detection feature. Sleep apnea is a sleep disorder that causes a person's breathing to repeatedly stop and start throughout the night. The feature is designed for the Apple Watch,

Sleep apnea is an increasingly common condition where a person temporarily stops breathing while asleep, which can cause blood oxygen levels to drop. This can lead to loud snoring or result in people waking up feeling tired.

The new Apple Watch 10's big screen was the most dramatic new Apple Watch hardware upgrade at this year's annual iPhone launch event, but a new sleep apnea detection feature might be the most valuable addition.

Apple announced that pending FDA approval, recent versions of the company's popular smartwatches will soon get features that can detect and track sleep apnea events. Here's how it will work.