Page 175 - PowerPoint 演示文稿

Progressive Addition Lenses 165

Fig. 11.45: Progressive designs for eye turners and head turners

for the individual wearer, manufactured by free-form technology and
to recognize its individual nature, micro-engraved with the wearers
initials.

WHO IS SUITABLE FOR PROGRESSIVE ADDITION LENSES?
(Criteria for good candidate)
The introduction of numerous varieties of progressive lenses has made it
suitable for almost every presbyopes, for every visual demand and for
every wallets, Still proper selection of an ideal candidate is the first criteria
for the successful dispensing of progressive addition lens. Before
identifying a suitable candidate, the evaluation must be done on the
following factors:

General Factors
Careful consideration is needed before advising progressive addition lenses
for those with any history of difficulties in adapting to changes in lens
power or frame styles. Persons having an interest in trying new things can
be good candidates. People with small pupil are more suitable for
progressive addition lenses as the effect of peripheral aberration is reduced.
An unsatisfied patient with other designs of bifocals may found himself
motivated to adjust with progressive lenses. The patient with narrow
papillary distance and wider facial width may also be an unsatisfied user
of progressive lenses.