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Keratoconus managed with intacs: one-year results.
Samuel Levinger1, Russell Pokroy
1Enaim Refractive Surgery Center, Jerusalem, Israel.
Intacs implantation improved vision and reduced refractive errors in keratoconus patients. Predictors of successful outcomes included milder keratoconus and significant myopia.
Area of Science:
- Ophthalmology
- Biomedical Engineering
Background:
- Keratoconus is a progressive corneal ectasia leading to visual impairment.
- Intacs (Intrastromal Corneal Ring Segments) offer a surgical option for managing keratoconus.
Purpose of the Study:
- To evaluate the visual outcomes of keratoconus treated with Intacs.
- To identify preoperative factors predicting successful outcomes after Intacs implantation.
Main Methods:
- Retrospective analysis of 58 eyes from 43 keratoconus patients undergoing Intacs implantation.
- Outcome measures (visual acuity, refraction, topography) assessed preoperatively and one year postoperatively.
- Correlation of preoperative parameters with visual outcomes.
Main Results:
- Intacs implantation showed no intraoperative complications.
- Significant improvements observed in uncorrected visual acuity (UCVA), spherical equivalent, and astigmatism.
- Mean UCVA improved from <20/200 to 20/50; mean astigmatism reduced from 3.34 D to 1.97 D.
- Best spectacle-corrected visual acuity (BSCVA) remained stable.
Conclusions:
- Intacs effectively improve myopia and regular astigmatism in keratoconus patients.
- Predictors for better outcomes include milder keratoconus (BSCVA > 20/32, astigmatism < 3.50 D) and significant preoperative spherical myopia (> -1.75 D).
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