Abstract
Purpose
As presbyopia occurs, new visual demands create a need for clear vision at multiple
distances. Many spectacle wearers adapt into progressive addition lenses (PAL) in
order to see clearly at distance, intermediate, and near. A multifocal contact lens
provides the ability to see at these same distances without the prismatic effects
of a spectacle lens or the peripheral obstruction of a spectacle frame. No studies
have been done to date comparing the effect of these types of presbyopic vision correction
on a variety of tests of visual performance representative of everyday tasks.
Methods
A battery of visual performance tasks were completed by subjects while wearing their
habitual PAL spectacles. These subjects were then fit with a multifocal contact lens
and wore lenses for 2 weeks or more before completing the tasks again. These functional
vision tests included assessments of coincidence anticipation timing, peripheral search
and hand-eye coordination, and dynamic visual acuity. Following functional vision
testing, subjects completed a preference survey comparing both types of refractive
correction while performing common activities of daily living.
Results
Performance on the majority of the tests of visual performance were equivalent (P < 0.05)
when comparing PAL spectacles and multifocal contact lenses. Survey results demonstrated
a preference for multifocal contact lenses overall.
Conclusion
PAL spectacles are widely prescribed for presbyopic patients. The findings of this
study suggest that in addition to providing excellent vision, multifocal contact lenses
provide functional vision performance equal to PAL spectacle wear and patients may
prefer them over PAL spectacles.
Keywords
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Article info
Publication history
Published online: May 25, 2021
Accepted:
May 23,
2021
Received in revised form:
May 14,
2021
Received:
May 6,
2021
Identification
Copyright
© 2021 British Contact Lens Association. Published by Elsevier Ltd. All rights reserved.
