Rigid lens centration: Effects of lens design and material density

Carney, Leo G., Mainstone, Julia C., Quinn, Thomas G., & Hill, Richard M. (1996) Rigid lens centration: Effects of lens design and material density. International Contact Lens Clinic, 23, pp. 6-12.


Two lens features of relevance to the control of rigid lens dynamics are material density and lens design. The effect of these two features on lens centration was investigated for two subject groups (four subjects with high riding lenses and four subjects with low riding lenses). Each subject was fit with 12 different lenses- six designs in each of two materials. The settled vertical lens position for a five blink cycle was assessed in every case. Overall, there was a statistically significant inter-subject effect of the measurements (p<0.001) and a significant difference in lens position between the two groups (p<0.001), For subjects with low riding lenses, lens material changes improved lens centration, but changes in lens thickness were relatively ineffective. An increase in lens diameter caused a lowering of the settled lens position for both groups. In general, all corrective strategies were less effective for high riding lenses then for low riding lenses

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ID Code: 3157
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: l.carney@qut.edu.au
Additional URLs:
Keywords: Rigid gas permeable, contact lens design, contact lens material, fitting
ISSN: 0892-8967
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 1996 Elsevier
Deposited On: 30 Jan 2006 00:00
Last Modified: 15 Jan 2009 06:54

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