Assembling and Testing Methods of Special Toric Spectacles (Only Astigmatic)
According to the characteristics of special toric lenses (only astigmatic),the reference point and optical processing center of astigmatism lens were analyzed,and the measurement methods of optical parameters,effective thickness of lens and light transmittance were summarized.By using the prism effect calculation formula,the length units of the optical center horizontal deviations (of one-side)and the optical center vertical deviations can be exchanged with the prism degree,effectively solving the problem of non-uniqueness of the optical center for special toric lenses.In addition,based on the characteristics of using special toric spectacles,test methods for prescription and nonprescription special toric spectacles,as well as unilateral and bilateral Special toric spectacles were proposed.
special toric lensesspecial toric spectaclesprescription assembled spectaclestest methods
万方数据
维普
