Soft bifocal contact lenses for patients with nearpoint asthenopia.

Bifocal contact lenses have generally been considered solely for the presbyopic population. However, pre-presbyopic individuals with accommodative or vergence disorders who respond favorably to plus lenses at near may be good candidates for bifocal contact lenses. A group of ten non-presbyopic patients who manifest accommodative dysfunctions or near point esophoria were fit with the Ciba BI-SOFT contact lenses. Nearpoint accommodative and vergence findings were evaluated through both near point plus spectacle lenses and the bifocal soft lenses. Results indicate that the BI-SOFT bifocal contact lens was effective in changing the near point visual posture. However, poor distance vision acuity due to ghost images reduced the subjective success rate of the BI-SOFT lens on this non-presbyopic population.
AuthorsD P Libassi, C L Barron, R London
JournalJournal of the American Optometric Association (J Am Optom Assoc) Vol. 56 Issue 11 Pg. 866-70 (Nov 1985) ISSN: 0003-0244 [Print] UNITED STATES
PMID4078211 (Publication Type: Journal Article)
  • Adult
  • Asthenopia (therapy)
  • Contact Lenses, Hydrophilic
  • Humans
  • Pilot Projects

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