When we suspect that our child is “nearsighted” and take him or her to the eye doctor, most of the time the doctor will ask your child to go for an “optometry”, i.e., to check the prescription of the eyes. However, the report or medical record may contain only a few letters, mathematical symbols and numbers. In general, parents who take their children to the optometrist will often get two types of results. One is a small slip of paper like a supermarket receipt, as follows (Figure 1) This is the result of computerized optometry, please parents remember that the results of computerized optometry is a very rough result, not the final report of optometry, on the basis of computerized optometry, professional optometrist or optician will be based on this result for further more accurate “subjective optometry “, the doctor or optometrist will examine your child one-on-one, and from time to time ask your child “which line of the vision chart can you see”, “is it better or worse”, ” “Which is clearer? The final report will be similar to Figure 2: (Figure 2) or recorded in your medical record in the form of a handwritten note as follows: OD: +1.00DS/-1.00DCX180°->1.0 OS: -2.00DS/-1.00DCX90°->1.2 Let’s explain the third one first: OD is for the right eye, OS is for the left eye OD: +1.00DS represents 100 degrees of farsightedness and -1.00DC represents 100 degrees of astigmatism, separated by /. The X180° at the back represents the axial direction of the astigmatism lens in 180° direction. The 1.0 behind the arrow means that the child can see 1.0 after giving 100 degrees of farsightedness and 100 degrees of astigmatism. Let’s look at the left eye (i.e. OS) OS: -2.00DS/-1.00DCX90° means that the left eye has 200 degrees of myopia and 100 degrees of astigmatism, and the axial direction of the astigmatism is 90°. After giving the child such a lens the child can see 1.2 Next we look at the results of Figure 2 will feel clear at a glance, the ball lens is DS, that is, the degree of myopia or hyperopia (+ sign is farsighted, – sign is myopia), the column lens is DC, that is, the degree of astigmatism, the axial position is the previous astigmatic lens axial. The “corrected visual acuity” is the visual acuity that the child can see on the vision chart after being given such a lens. Finally, let’s explain the symbols of the first computerized optometry report: First, R is for the right eye, and L is for the left eye. Taking the right eye as an example, we can see that R has 4 rows and 4 columns. We first look at the line, the first three lines refers to the repeated measurement of three times, in order to ensure accuracy, the general computerized optometry each eye is set to even test three times, the results of these three times may be different, but the general gap is very small. The fourth row is the average of the first three times the degree checked. The first column is S, which is the abbreviation of DS representing nearsightedness or farsightedness, and as before, the + sign is farsightedness and the – sign is nearsightedness. The second column is C, which stands for DC that means astigmatism. The third column is A which is the axial direction of astigmatism. The subsequent column 9 represents the confidence level. The computer will give the doctor the degree of reliability of this examination by calculation, 9 is the highest, meaning that the results of this examination are more reliable. So an optometry report mainly includes the information of myopia, hyperopia, astigmatism, astigmatism axis and corrected visual acuity of the tested eye.