Electronic liquid crystal contact lenses for the correction of presbyopia.
Presbyopia, the age-related reduction in near vision acuity, is one of the leading issues facing the contact lens industry due to an increasingly ageing population and limitations associated with existing designs. A plastic-based liquid crystal contact lens is described which is designed to allow switchable vision correction. The device is characterized by low operating voltages (<5V(rms)) and has curvatures suitable for placement upon the cornea. Imaging and Point Spread Function analysis confirm that the lens provides an increase in optical power of + 2.00 ± 0.25 D when activated, ideal for presbyopia correction.
Harry E
HE
Milton
Philip B
PB
Morgan
John H
JH
Clamp
Helen F
HF
Gleeson
D000368:Aged; D000375:Aging; D003263:Contact Lenses, Hydrophilic; D015350:Contrast Sensitivity / Q000502:physiology*; D004581:Electronics / Q000379:methods*; D006801:Humans; D050866:Liquid Crystals; D011305:Presbyopia / Q000503:physiopathology / Q000628:therapy*