Intracorneal Rings (INTACS SK) Might Be Beneficial in Keratoconus; A Prospective Nonrandomized Study

Keratoconus is a progressive corneal ectatic disorder that can lead to irregular astigmatism, increasing corneal steepening, and reduced visual quality. In selected cases, intracorneal ring segments may help regularize the corneal shape and improve visual performance.

For related specialist care, patients can also explore the clinic’s Corneal Treatment page and Investigations page.

Abstract

This prospective nonrandomized study evaluated the effect of intracorneal rings (Intacs SK) in keratoconic patients on corneal curvature, uncorrected visual acuity (UCVA), best corrected visual acuity (BCVA), and the progression of the cone over a three-year follow-up period.

Study Design

The study included 114 eyes of 71 keratoconic patients. Incisions were made in the steep meridian. UCVA, BCVA, and corneal topography were measured preoperatively and postoperatively at 1, 3, 6, and 12 months, then yearly for 3 consecutive years.

Main Findings

Corneal Curvature

The study reported a reduction in mean keratometry readings during postoperative follow-up, suggesting flattening and regularization of the cornea after Intacs SK implantation.

Uncorrected Visual Acuity (UCVA)

A large proportion of eyes gained visual acuity lines after surgery. The reported improvement was maintained through the study period, despite some fluctuation during the first 3 months.

Best Corrected Visual Acuity (BCVA)

BCVA also improved in most cases. The published results state that no eyes lost lines of UCVA or BCVA during the reported follow-up period.

Conclusion

The article concludes that, despite early fluctuation in keratometry and vision during the first few postoperative months, UCVA and BCVA improved and remained improved throughout follow-up. The study also emphasizes that patient selection remains a key factor in the success of Intacs implantation in keratoconic patients.

Clinical Relevance

Intracorneal ring segments are one of the surgical options used in selected keratoconus cases to reduce corneal steepening and improve vision quality. Patients exploring broader refractive and corneal procedures can also review Major Types of Corrective Eye Surgery.

For related clinical reading, you can also see Combined Phototherapeutic Keratectomy, Intracorneal Ring Segment Implantation, and Corneal Collagen Cross-Linking in Keratoconus Management.