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Recovery of corneal topography and vision following opaque tinted contact lens wear

Voetz, Stephanie C., Davis, Brett A., & Collins, Michael John (2004) Recovery of corneal topography and vision following opaque tinted contact lens wear. In Association for Research in Vision and Ophthalmology Meeting, 2004.

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Abstract

Purpose

To investigate corneal changes after wearing cosmetic tinted contact lens and the recovery of corneal topography.

Methods

Seven subjects took part in the study. The mean age was 26 years, ranging from 22 to 29 years. Three cosmetic tinted lens types and one control soft contact lens were investigated (Crazy Lenses, WildEyes, FreshLook Colors, Soft Lens Comfort). The Crazy Lens was the most heavily tinted lens, while the WildEyes lens had an intermediate level and the FreshLook lens a minimal level of tinting. Lenses were worn for one hour. Corneal topography data was measured before lens wear, with the contact lens in situ and at 0, 10, 20, 30, 60, 90, 120 and 150 minutes after lens removal. A videokeratoscope was used for all corneal topography measurements. Height data difference maps were calculated and corneal recovery measured. Visual acuity was taken in photopic and mesopic light conditions before lens removal and 1, 10, 30, 60, 120 and 150 minutes after lens removal. Subjective ratings of haloes and ghosting following lens wear were also recorded.

Results

For the Crazy Lens, concentric rings of steepening and flattening with a mean height change of 2.17 mm ± 0.98 (p<0.05) were found in the central cornea. The location of the ring shaped corneal changes corresponded to the edge of the clear pupil diameter of the tinted lens. Corneal recovery after removal of the Crazy Lens took up to 150 minutes. Visual acuity loss in high luminance during Crazy Lens wear was 0.29 logMAR (p<0.01). The subjective rating of haloes/ghosting was consistent with the visual acuity results. Up to 60 minutes after lens removal the subjects rated the Crazy Lenses as causing a substantial increase in haloes/ghosting compared with baseline (p<0.05). For the WildEyes and FreshLook lenses, smaller changes in corneal topography and vision were found after one hour of lens wear.

Conclusions

Patients who wear cosmetic tinted lenses need to be aware of the potential for reduced visual performance, both during lens wear and for several hours after lens wear.

Impact and interest:

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ID Code: 12129
Item Type: Conference Item (Poster)
Additional Information: abstract published in Investigative Ophthalmology & Vision Science, 45, E-Abstract 1577
Additional URLs:
Keywords: contact lens, cornea, clinical science, topography
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300)
Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300) > Vision Science (111303)
Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300) > Optical Technology (111302)
Divisions: Current > Research Centres > Centre for Health Research
Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2004 Association for Research in Vision and Ophthalmology
Deposited On: 18 Jan 2008
Last Modified: 10 Nov 2014 05:03

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