NO.1 Standardized routine optometry.
NO.2 In principle, myopia should be fully corrected, and hyperopia should be weakly corrected.
NO.3 Correction of astigmatism, pay attention to the axial direction of astigmatism (especially inverse astigmatism), the degree can be shallow or shallow.
Because there are three main factors that affect the peripheral aberration of progressive films: astigmatism, add, and lens design, so the astigmatism should not be too large.
NO.4 add measurement needs to be tested by FCC, and NRA and PRA should be measured at the same time.
Calculation method: add=(NRA+PRA)/2+FCC
NO.5 It is necessary to check the downward rotation ability of the patient's eyes, which is convenient for the optometrist to choose the channel.
For example, can this luminosity be equipped with progressive film?
Caution is required when the anisometropia is relatively large, especially if the diopter difference in the vertical direction is greater than 2.00D.
We compared the diopters in the vertical direction of the left and right eyes and found that the difference is only -1.50D, so this luminosity can be fitted progressively.
NO.7 For people who have been wearing myopia glasses, comfort and clarity are very important. The corrected visual acuity of the new glasses cannot be lower than that of the old glasses.
NO.8 For people who did not wear glasses before (emmetropia, mild myopia or hyperopia), try to give a certain degree of positive power (fog vision), which can reduce add and thus reduce aberrations.
Post time: May-06-2023