Single Vision eyeglass lenses have only one correction or prescription for each eye, unlike bifocal eyeglass lenses which are an example of multifocal lenses. Whether you are farsighted or nearsighted, there are many options for enhancing the comfort and function of your new glasses.
Multifocal eyeglass lenses have more than one corrective prescription for each eye. Multifocal lenses can be either Bifocal or Trifocal. Bifocal lenses have two different corrections, one to help you see better both up close and another for far away. Trifocal lenses add a correction for the intermediate range.
No-line Progressive eyeglass lenses provide a natural transition of prescription change as opposed to the traditional multifocal lenses which have distinct viewing areas. No-Line Progressives eyeglass lenses provide a smoother more Single vision look without the distraction of the visible unsightly lines that separate the different correction areas of traditional Progressives. They are usually prescribed for people whose focus has declined due to presbyopia.