Children with myopia go to the ophthalmology department of the hospital for refractive examinations for children's eyeglasses, and the doctor always hands over a computer-printed optometry sheet to the parents. See the crisscross Arabic numerals and English alphabet above, is it a mask?

VD: Vertex distance - the distance from the center of the posterior surface of the eyeglass to the vertex of the cornea.

<R> Represents the right eye,<L>represents the left eye

S-spherical mirror, the number represents the degree of nearsightedness or farsightedness. A+ before the number indicates the degree of farsightedness, while a - before the number indicates the degree of nearsightedness.

C-astigmatic prism, the number represents the degree of astigmatism. A+ before the number indicates the degree of farsightedness astigmatism, while a - before the number indicates the degree of nearsightedness astigmatism.

The axis position of A-astigmatism, which is the direction of the astigmatism axis. 90 indicates that the astigmatism axis is at 90 degrees.

The fourth column: refers to the credibility of data collection, and a number ≥ 6 should be required to indicate that the measured value is reliable.

PD: Pupil distance - the distance between the centers of the pupils of two eyes.

Computer optometry typically takes three measurements per eye, and then the computer automatically calculates the average of these three measurements. After reading these, the computer optometry form shown in the above picture is very simple.

However, computer optometry is only a preliminary examination, not the final prescription for optometry with childrens eyeglasses. The final prescription for glasses can only be concluded by doctors after conducting relevant examinations and comprehensive analysis.