Intel's RealSense 3D camera supports this functionality and the microprocessor manufacturer has published a website with a list of all the devices supporting Windows Hello facial recognition.
It is important to have your eyes examined regularly. Your eyes should be tested: before age 40, every two to four years. from age 40 to age 54, every one to three years. from age 55 to 64, every one to two years. after age 65, every six to 12 months.
Usually the eye exam will last around 20 minutes. Some are even shorter about 10 or 15 minutes. But some people will spend a longer time on the eye exam, maybe about an hour depending on whether you need to have a comprehensive eye exam.