Final answer:
The Scheiner Principle is incorporated into automated optometers by using a computer-controlled system that projects multiple light sources onto the patient's eyes and analyzes the images formed on the retina to determine the refractive error.
Step-by-step explanation:
The Scheiner Principle, also known as the Scheiner's Disk, is a method used in optometry to determine the visual acuity of a person's eyes. It involves the use of a disk with two small openings, through which light enters the eyes. When the images formed by the two openings do not overlap on the retina, it indicates a refractive error or a problem with the eyes.
In automated optometers, the Scheiner Principle is incorporated by using a computer-controlled system. The system projects multiple light sources onto the patient's eyes and analyzes the images formed on the retina. By measuring the position and alignment of the images, the optometer can determine the refractive error and prescribe appropriate corrective measures.
For example, in an automated optometer, the computer might project four light sources onto the patient's eyes. If the images formed on the retina are not aligned, it indicates a refractive error, such as nearsightedness or farsightedness. The optometer can then calculate the prescription needed to correct the refractive error.