Visual decrement with deposit accumulation of HEMA contact lenses

Gellatly, Kenneth W., Brennan, Noel A., & Efron, Nathan (1988) Visual decrement with deposit accumulation of HEMA contact lenses. American journal of optometry and physiological optics, 65(12), pp. 937-941.


The vision decrement associated with deposit accumulation on hydroxyethyl methacrylate (HEMA) contact lenses was assessed in 51 patients presenting consecutively to a large clinic. Both high contrast visual acuity (HCA) and low contrast visual acuity (LCA) (logMAR) decreased with increased deposition (Rudko classification). Apart from being consistently lower than HCA, LCA offered no additional useful information. Both HCA and LCA worsened with lens age, whilst lens deposition increased with lens age (p less than 0.001). No associations between any of the above measures and patient symptoms were revealed. In general, unacceptable vision decrement and deposit formation occurred after 12 months or 4,000 h of daily lens wear. Clinicians can use the data presented in this paper to reconcile vision loss with deposit formation in patients wearing HEMA lenses.

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ID Code: 3361
Item Type: Journal Article
Refereed: Yes
Additional Information: For more information, please refer to the journal's website (see link) or contact the author. Author contact details:
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Keywords: Vision, Contact Lenses/, adverse effects Contrast Sensitivity Cross, Sectional Studies Equipment Failure Humans Methacrylates Research Support, Non, U, S, Gov't Statistics Time Factors Visual Acuity
ISSN: 0093-7002
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 1988 Lippincott, Williams and Wilkins
Deposited On: 17 Feb 2006 00:00
Last Modified: 10 Aug 2011 13:21

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