ArticleInternational ophthalmology2021
Combination of violet light irradiation and collagenase treatments in a rabbit model.
Article in International ophthalmology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It has been retracted, and should not be counted. Not yet cited in PubMed.
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Corrections and comments
- Retraction · 2021-11-13Error by Journal/Publisher ·
- Retracted
Authors and funding
3 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeTo investigate the use of collagenase type II for generating a rabbit model of keratoconus and to evaluate the impact of violet light (VL) irradiation on the disease model.
methodsSix Japanese White rabbits were used. After epithelial debridement, the collagenase group was treated with a collagenase type II solution for 30 min; the control group was treated with a solution without collagenase. Three rabbits also underwent VL irradiation (375 nm, irradiance 310 μW/cm
resultsA significant increase in Ks and corneal astigmatism was observed in the collagenase and VL irradiation groups compared with the control group at day 7. No significant difference was found in the change in corneal thickness between the groups. The elastic modulus at 10% strain but not at 3% and 5% strain in the collagenase group was significantly lower than that in the control group. There was no significant difference in the elastic modulus at each level of strain between the collagenase and VL irradiation groups. The average axial length at day 7 in the collagenase group was significantly longer than that in the control group.
conclusionsCollagenase type II treatment can mimic keratoconus with increased corneal keratometry and astigmatism. There was no significant difference in the observed elastic behaviour of normal and ectatic corneas under physiologically relevant stress levels. VL irradiation did not cause regression of corneal steepening in this model with short-term observation.
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