Adjustable Focus Eyeglasses with Dual Unilateral Actuation
Adjustable focus eyeglasses where the range of adjustment can be moved. That is, if a pair of adjustable focus eyeglasses have a range of 0 diopters to 2.75 diopters (to provide a 2.75D ADD for reading for an emmetrope), this invention could, for example, permit the user to move the range from 0D to 2.75D to 2.00D to 4.75D so as to accommodate a short term change in the user's distance vision requirement. Each eye can be adjusted independently.
1 . (canceled)
2 . Variable focus spectacles comprising:
first and second transparent members;
first and second membrane support structures, each having an opening therein, the first and second membrane support structures being respectively associated with and mounted adjacent to and within the field of view of the first and second transparent members;
first and second adjustable connectors respectively connecting the first and second transparent members to the first and second membrane support structures,
each of the first and second adjustable connectors allowing adjustment of a distance between its respective transparent member and its associated membrane support structure at a location of the connector while, at another location along a perimeter of the transparent member spaced apart from the location of the connector, a distance between the respective transparent member and its associated membrane support structure is kept unchanged,
each of the first and second adjustable connector further allowing adjustment of the distance between the respective transparent member and its associated membrane support structure at the other location while the distance between the respective transparent member and its associated membrane support structure at the location of the adjustable connector is kept unchanged,
first and second transparent membranes respectively attached to the first and second membrane support structures across the openings;
first and second flexible seals respectively extending between the first and second transparent members and their associated membrane support structures, the first and second flexible seals permitting motion between the respective first and second transparent members and their associated membrane support structures; and
liquid having a predetermined index of refraction substantially filling respective spaces between the first and second transparent members and their associated membrane support structures within their respective seals.
3 . The variable focus spectacles of claim 2 , wherein the first and second transparent members are first and second lenses each having a predetermined optical power.
4 . The variable focus spectacles of claim 2 , further comprising a bridge disposed between the first and second transparent members and between the first and second membrane support structures, the bridge being connected to the first transparent member or the first membrane support structure at a first bridge support location and connected to the second transparent member or the second membrane support structure at a second bridge support location,
wherein the first and second adjustable connectors are located at respective locations spaced apart from the first and second bridge support locations, respectively.