The area of the slide seen when looking through the microscope is referred to as the field of view.
When you look through the eyepiece of a microscope, the circular area that you can see is the field of view. This area can vary depending on the magnification used. At lower magnifications, the field of view is larger, allowing you to see more of the slide at once. As you increase the magnification, the field of view becomes smaller, focusing on a smaller area but providing greater detail of the specimen.
Understanding the field of view is essential for effectively navigating and observing specimens under the microscope, as it helps you gauge how much of the slide you’re examining and where to move your slide to find specific areas of interest.