Bifocal Soft Contact Research Articles

Simultaneous imagery soft bifocal contactlenses

Introduction Eye care professionals continue to search for the successful bifocal contact lens. As designs advance toward higher patient acceptability, practitioners are required to judge design compatibility referenced to patient. need. No one lens manufacturer to date has produced a panacea for presbyopia or any other eye anomaly, but advances in fabricating technology have become the cause for renewed bifocal interest. Old ideas have been discarded or altered to provide functional performance at a new level. This paper deals with my experience with the first generation of two different simultaneous image soft bifocal contact lens which meet the level of patient success most eye care professionals find acceptable. The HYDROCURVE II ® Bifocal Contact Lens produced by Barnes-Hind of California and the ALGES ® Bifocal Contact-Lens manufactured by University Optical Products of Florida. Both lenses are concentric in configuration which allies the fitting scheme to single vision soft lenses. One persistant obstacle to segmented bifocal contact lenses, especially soft, has been their need to translate on the eye for proper optical function. Since the target audience is usually over age 40 years, the movement of 14ram+ of hydrophilic material over this somewhat dryer eye is difficult to consistanfly attain. Additionally, the translation action may be variable from morning to afternoon because of decreasing tear volume during the day. Since these concentric bifocal soft lenses do not rely on translation function, adaptation and patient acceptance should be high if optical performance is of sufficient quality and quantity.

A new soft contact lensannular bifocal

This paper describes the results of a six-month clinicalstudy of twenty-eight presbyopic subjects who were fitted with the Sof-form® annular bifocal soft contact lens with a bal-flange construction made by Salvatori Ophthalmics of Sarasota, Florida. The subjects were evaluated as regular contract lens patients. Distance and near visual acuities and near stereopsis were reduced with the soft bifocal contact lenses. The lenses were reported comfortable and no clinical physiological problems were observed. At the conclusion of the study, seventeen, (16%) of the subjects were still wearing their lenses.