Difference between revisions of Close-up glasses
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==First Differentials== | ==First Differentials== | ||
The first differentials are typically 1.5 D weaker than your [[measurement]] for full distance vision. If you have -0.25 to -0.75 D of cylinder, you have the option of dropping that and having the sphere only 1.25 D weaker. | The first differentials are typically 1.5 D weaker than your [[measurement]] for full distance vision. If you have -0.25 D of cylinder, you have the option of dropping that. If you have -0.5 to -0.75 D of cylinder, you have the option of dropping that and having the sphere only 1.25 D weaker. | ||
See [[Lens#How to use Contacts with EM|How to use Contacts with EM]] if you wear contacts. | See [[Lens#How to use Contacts with EM|How to use Contacts with EM]] if you wear contacts. | ||