شنبه، اسفند ۰۳، ۱۳۸۷

The Lost Art of Eyeglass Adjustments



The glasses do not stay in place. (Temples spread too widely; temple adjustment behind ears is too loose or incorrect; pads spread too far; bridge too wide; doesn’t fit nose; eyeglasses are too heavy.)


The frame sits too high. (Bridge is too narrow; distance between nose pads too small; pad arms too low; poor overall fitting.)


The frame sits too low. (Bridge is too wide; distance between nose pads too far; pad arms adjusted incorrectly; angle incorrect.)


The frame touches the eyebrows. (Temple angle is too retroscopic; poor overall fit.)


The outer ear hurts. (Temple rides too high on ear; temple touches ear cleft; temple touches lobe of upper ear; temple tip touches outer lobe of ear at the bottom of the lobe.)


The head hurts behind the ear. (Contact area is too narrow or small; temple tips “dig in”; temples too narrow or tight against head; temples are too short.)


Temples wobble or flop open. (Patient has a screw loose {J}; rivets loose; rivets broken; internal spring mechanism broken or about to break.)


The temples are too long or short. (Poor fit; lazy fitter.)


Vision seems “off,” but was acceptable at initial dispensing. (Prescription filled incorrectly; prescription ordered incorrectly; error in vertex fitting in strong prescriptions; base curve incorrect; defective and/or warped lenses; pantoscopic tilt is incorrect; face form is incorrect; unwanted waves present in lenses; scratches.)


Vision problems occur at near – especially with progressives. (Prescription incorrect; frame too high or low; O.C. placement incorrect vertically or horizontally; reading area is too small; fitting height incorrect; incorrect brand was chosen for patient; objects “swim” or move when wearer turns head.


Wearer is having problems in adapting to the prescription (Incorrect prescription; fit does not match old eyewear.)


Wearer is having problems adapting to the frame/adjustment. (Wearer is switching back and forth between the new glasses and the old; not wearing the glasses long enough to adapt; bifocals located in different place than old pair.)


Vision is unclear at specific working distances. (Patient needs bifocal, trifocal, or progressive lenses; wearer’s visual needs have changed; glasses not being used for prescribed purpose; segment or fitting height is incorrect; the near addition power is incorrect.)


Wearer is experiencing unwanted reflections and/or ghost images. (Glasses need more or less pantoscopic or retroscopic tilt; base curve needs to be changed; lenses are uncoated (AR), especially in polycarbonate and high-index lenses.)


Wearer is experiencing “vague” problems and has unclear complaints. (Optical cause; wearer has changed his or her mind about frame selection; family members or friends do not like glasses; after finally seeing the glasses, the wearer does not like them anymore; patient is experiencing buyer’s remorse because of the high cost of the eyewear.)

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