The method of detecting eye prescription is optometry, which is a very routine examination method in ophthalmology, and can be divided into two kinds of optometry and computerized optometry, and the one that is used more often is computerized optometry. The method of optometry is different for different age groups. Adults can choose direct computerized optometry because the refractive state of adult eyes has stabilized and the adjustment ability of the eyes has decreased, so people in this age group can accurately determine whether they have refractive error and the exact prescription through direct computerized optometry. But if it is a minor or a child, because their eyes are still in the developmental stage, so the adjustment ability is stronger, then you need to dilate the pupil, use the pupil dilating drugs to dilate the pupil and then go to the computerized optometry or the examination of the shadow optometry, so that the results are more accurate.