High-speed photography captures images with a remarkably quick shutter speed, and it is mostly used for capturing moments that are not appreciated with the naked eye. It is the art of photographing a rapidly occurring event. Scientists have used high-speed photography to study physical movement, measuring phenomena such as surface tension and gravitational effects. It is also employed for tracking the accuracy of missiles and rockets and recording the sequence of events at the core of nuclear explosions. Sports photographers use high-speed photography to shoot fast-moving sporting events and to enhance the performance of athletes by analyzing their speed and movements.Human eyes are accustomed to viewing videos at 24 frames per second to 25 frames per second (fps), and it is believed that 30 fps is the final limit of a human eye to appreciate the sequence of movements. High-speed cameras with much faster shutter speed are usually employed for recording videos to assess the fine details of any special event. The iPhone 5S has an inbuilt native feature of recording videos at 120 fps, while the iPhone 6 records at 240 fps. Attaching an iPhone to a slit lamp or microscope with the help of an adaptor can help in recording videos at higher fps on the “slo-mo” mode of the recorder. These videos capture 120 fps; in other words, 120 images are being recorded in a second of a particular event. This provides a detailed analysis of the sequence of events that a normal human eye fails to appreciate.
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