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English to Russian translations [PRO] Medical - Medical (general)
English term or phrase:"add" power
For the left eye, you will notice that the "sphere" number is plus one (+1.00) DS. The letters
DS refer to "diopters sphere" and indicate that the left eye’s correction is totally spherical in nature with no astigmatism. In other words, the right eye’s cornea probably has a slightly oblong shape, and the left cornea’s shape is very close to being perfectly round. It is common to write SPHERE or DS as a place holder in the astigmatism number’s place to make sure that the reader of the prescription knows that the doctor did not accidently forget to record the cylinder or astigmatism correction.
Finally, the ADD number of +1.75 represents the power that needs to be "added" to the distance prescription to give the patient clear vision at a close range for reading and near point activities. This number is usually absent in younger people's eyeglass prescriptions. While some young people can develop near focusing problems and need an ***"add" power***, it usually indicates that a patient needs a bifocal power as he starts to loose his near focusing ability (a problem that commonly begins to develop as we reach our forties.)