Variable density ophthalmic device
Sunbather's eye protectors
Optical accessory for use with spectacles
Optical accessory for spectacles Patent #: 4890910
ApplicationNo. 636183 filed on 12/31/1990
US Classes:351/57, With auxiliary lenses movable in and out of the optical path (e.g., clip-on type attachments)351/47Removable and/or adjustable filters or screens (e.g., clip-on type)
ExaminersPrimary: Bovernick, Rodney B.
Attorney, Agent or Firm
International ClassesG02C 009/00
AbstractA clip-on accessory for positioning auxiliary optical elements in front of the lenses of eyeglass can be easily assembled to custon fit eyeglasses having any of a variety of different sizes and configurations. An outline of the lens regions of the particular pair of eyeglasses is prepared and two initially oversized optical elements are trimmed to conform with the outline. Upper and lower eyeglass engaging claps are secured to each element and ends of a resilient bridge member are inserted into passages in each upper clasp. At least one upper clasp and the optical element to which it is fastened is slid along the bridge member to space the elements apart a distance corresponding to the spacing of the eyeglass lens regions. The upper clasps are then secured to the bridge member and end portions of the bridge member that protrude from the upper claps are cut off.