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- Adjustable-focus_eyeglasses abstract "Adjustable focus eyeglasses are prescription eyeglasses with an adjustable focal length. They compensate for refractive errors (such as presbyopia) by providing variable focusing, allowing users to adjust them for desired distance or prescription, or both.Current Bifocals and progressive lenses are static, in that the user has to change their eye position to look through the portion of the lens with the focal power corresponding to the distance of the object. This usually means looking through the top of the lens for distant objects and down through the bottom of the lens for near objects. Adjustable focus eyeglasses have one focal length, but it is variable without having to change where one is looking.Possible uses for such glasses are to provide cheap glasses for 3rd world countries, or to accommodate for presbyopia.".
- Adjustable-focus_eyeglasses wikiPageID "19065640".
- Adjustable-focus_eyeglasses wikiPageRevisionID "580663721".
- Adjustable-focus_eyeglasses hasPhotoCollection Adjustable-focus_eyeglasses.
- Adjustable-focus_eyeglasses subject Category:Corrective_lenses.
- Adjustable-focus_eyeglasses subject Category:Eyewear.
- Adjustable-focus_eyeglasses type Artifact100021939.
- Adjustable-focus_eyeglasses type CorrectiveLenses.
- Adjustable-focus_eyeglasses type Device103183080.
- Adjustable-focus_eyeglasses type Instrumentality103575240.
- Adjustable-focus_eyeglasses type Lens103656484.
- Adjustable-focus_eyeglasses type Object100002684.
- Adjustable-focus_eyeglasses type OpticalDevice103851341.
- Adjustable-focus_eyeglasses type PhysicalEntity100001930.
- Adjustable-focus_eyeglasses type Whole100003553.
- Adjustable-focus_eyeglasses comment "Adjustable focus eyeglasses are prescription eyeglasses with an adjustable focal length. They compensate for refractive errors (such as presbyopia) by providing variable focusing, allowing users to adjust them for desired distance or prescription, or both.Current Bifocals and progressive lenses are static, in that the user has to change their eye position to look through the portion of the lens with the focal power corresponding to the distance of the object.".
- Adjustable-focus_eyeglasses label "Adjustable-focus eyeglasses".
- Adjustable-focus_eyeglasses sameAs m.04jlfp_.
- Adjustable-focus_eyeglasses sameAs Q4683191.
- Adjustable-focus_eyeglasses sameAs Q4683191.
- Adjustable-focus_eyeglasses sameAs Adjustable-focus_eyeglasses.
- Adjustable-focus_eyeglasses wasDerivedFrom Adjustable-focus_eyeglasses?oldid=580663721.
- Adjustable-focus_eyeglasses isPrimaryTopicOf Adjustable-focus_eyeglasses.