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March 21, 2026American journal of optometry and physiological optics

Measured and Laboratory‐Stated Parameters of Hydrophilic Contact Lenses

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Authors

JBJoseph T. BarrGLGerald E. Lowther

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Overview

Analysis demonstrates lens specifications in hydrophilic contact lenses, highlighting quality issues.

Key Points

  • This analysis aims to measure and inspect the parameters of hydrophilic contact lenses from different manufacturers.
  • Random selection of 131 hydrophilic lenses from an optometry clinic
  • Measurement of base-curve dimensions, power specifications, central thickness, and overall diameter
  • Inspection for surface scratches and defects
  • Approximately 60% of lenses had base-curve specifications within specified ranges.
  • More than 65% of lenses were within 0.25 D of the power specification.
  • Two-thirds of lenses met central thickness and diameter specifications within 0.04 mm and 0.40 mm, respectively.
  • Most lenses exhibited surface and edge defects.

Cite This Study

Barr et al. (1977) studied this question.

synapsesocial.com/papers/69be38b56e48c4981c67949dhttps://doi.org/10.1002/j.2330-9512.1977.tb02444.x
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Base Curve Measurements of Soft Contact Lenses1981
  2. 2Accuracy of Manufacturers' Stated Center Thickness of Hydrogel Contact Lenses1978
  3. 3Light Transmission of Hydrogel Contact Lenses1978
  4. 4The Measurement of the Bausch & Lomb Soflens Contact Lens by Interferometry1979
  5. 5Evaluating Soft Contact Lens Quality1988