I believe that everyone who wears glasses has taken a lot of prescriptions, but most people hold the prescriptions in their hands, but the characters on them seem to be “familiar” but can’t read them. In fact, they want to be like a doctor or optometry. It is not difficult at all for the teachers to interpret the optometry sheet.

The use of optical glasses to correct vision requires scientific medical optometry, correct inspection of eye power and other related parameters, and assembly in strict accordance with the prescription parameters, in order to produce qualified and suitable glasses. When we got the optometry sheet, most people were quite confused about the technical terms. Here is an explanation of these data for everyone, so that you can understand the optometry sheet:

The use of optical glasses to correct vision requires scientific medical optometry, correct inspection of eye power and other related parameters, and assembly in strict accordance with the prescription parameters, in order to produce qualified and suitable glasses. When we got the optometry sheet, most people were quite confused about the technical terms. Here is an explanation of these data for everyone, so that you can understand the optometry sheet:

When you get the optometry sheet, you will see indicators such as OS and OD. They are Latin abbreviations: OS (oculus sinister) represents the left eye and OD (oculus dextrus) represents the right eye. Sometimes, you will see the symbol ou (oculus terque), which means that this indicator involves the content of both eyes. Generally speaking, the larger the digital sign on the optometry sheet, the worse your vision, and the more vision correction you need. The “plus” (+) sign in front of the number indicates that you have foresight, and the “minus” (-) sign indicates that you have myopia. These numbers represent diopter, a unit used to measure the correction or focusing ability of the lens required by the eye. Diopter is usually abbreviated as “D”.

For example, if your optometry sheet says -1.00, you have a myopia diopter. This shows that you have mild myopia. If you are -4.25, that means you have 1 / 4 of your myopia diopter. This is more nearsighted than -1.00 just now and requires stronger (thicker) lenses. Similarly, + 1.00 will be a small amount of hyperopia, and + 5.00 means you have heavier hyperopia. A diopter is equivalent to the usual 100 degrees.

For people with astigmatism, there are three numbers in the optometry sheet. The general form is s x C X axis

The s represents spherical, which is the refractive degree of myopia or hyperopia discussed above.

The C represents the cylindrical mirror cylinder and can be positive or negative. It measures your astigmatism in diopter. The larger the number, the more astigmatism. The most common condition of astigmatism is that the cornea is shaped like a football rather than a football.

The axis represents the axis position, ranging from 0 degrees to 180 degrees. It indicates the direction of astigmatism. It is not enough to specify how much astigmatism there is; You must know the difference in curvature.

The first line indicates that the person’s right eye has 5.25 diopters myopia, 3.00 degrees astigmatism and 90 degrees axial. (equivalent to 525 degree myopia, 300 degree astigmatism and 90 degree astigmatism axis in the right eye).

The second line represents that the person’s left eye has 5.25 diopters myopia, 2.50 degrees astigmatism and 85 degrees axial. (equivalent to 525 degree myopia, 250 degree astigmatism and 85 degree astigmatism axis in the left eye).