I have found that many people want to get their glasses done cheapest eyeglasses online, but they are not sure if their ratings are correct. It is said that many people with myopia are from the same path, and there are many eyewear shops in and out, but few people understand the optometry sheet.
Every time I see an optometry sheet, I feel like I'm facing extraterrestrial text, with a confused expression on my face. OS: Refers to the left eye, and "L" can also be used to refer to the left eye; OD: Refers to the right eye, and "R" can also be used to refer to the right eye.
- It is the abbreviation of the word Sphere, referring to the degree of myopia/hyperopia- 3.00D refers to nearsightedness of 300 degrees, with negative numbers indicating nearsightedness+ 2.50D refers to 250 degrees of hyperopia, where a positive number refers to hyperopia.
- It is an abbreviation for the word Cylinder, referring to the degree of astigmatism; Ax, abbreviated for the word Axis, refers to the direction of astigmatism- 1.00 refers to 100 degrees of astigmatism, and 75 refers to 75 degrees in the direction of astigmatism.
Visual correction refers to the value of vision after wearing discount prescription glasses. Pupil distance refers to the distance between the pupils (eyeballs) of two eyes.
Another thing that needs to be examined is the trial wearing of the trial frame and the changes in this degree compared to the old degree. If there is a significant difference between the old degree and this degree, it is necessary to verify whether the old degree is significantly lower or whether this degree is significantly higher, and it needs to be tested through a test frame.
