1 / 12

Comparison of single-segment and double-segment Intacs® insertion with femtosecond laser for keratoconus

Comparison of single-segment and double-segment Intacs® insertion with femtosecond laser for keratoconus. Tiep KHUC, Marc DOAT, Jean-Louis BOURGES, Nicolas ALFONSI, Jean-Marc LEGEAIS, Gilles RENARD Hôtel-Dieu Hospital, Paris, France Authors have no financial interest. Purpose.

cwen
Télécharger la présentation

Comparison of single-segment and double-segment Intacs® insertion with femtosecond laser for keratoconus

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Comparison of single-segment and double-segment Intacs® insertion with femtosecond laser for keratoconus Tiep KHUC, Marc DOAT, Jean-Louis BOURGES, Nicolas ALFONSI, Jean-Marc LEGEAIS, Gilles RENARD Hôtel-Dieu Hospital, Paris, France Authors have no financial interest

  2. Purpose To evaluate the efficacy of single-segment Intacs® using the femtosecond laser (IntraLase®, AMO) for insertion and compare with double-segment Intacs® in subjects with keratoconus

  3. Methods (1/2) • Setting: Hôtel-Dieu, Paris, France • Prospective study • 66 eyes of 59 patients classified into two groups - single-segment group: 38 eyes, 35 patients - double-segment group: 28 eyes, 26 patients • Both groups matched by t test

  4. Methods (2/2) • Implantation procedure Femtosecond IntraLase® FS 2 laser (60 kHz) (IntraLase Corp.) • Parameters - dissection’s depth in the cornea was 80% of the central pachymetry (300 – 400 µ) - channel dissection size: 6.6 x 7.6 mm • Main outcome measure: improvement of visual acuity, refractive error, K values • Follow-up: 6 months • Single or double-segment Intacs® implanted according to keratoconus asymetry and spherical equivalent (SE)

  5. Global results p < 0.05 for each variable.

  6. Single-segment results p < 0.05 for each variable. Improvement of UCVA for 34 eyes (89%).

  7. Double-segment results p < 0.05 for each variable, except cylinder (p=0.18). Improvement of UCVA for 21 eyes (75%).

  8. Comparison double vs single-segment Only 1 eye experienced loss of BSCVA in the single-segment group, versus 5 eyes in the double-segment group.

  9. Complications • No peroperative complication • 8 Intacs® (7.6%) were removed from 5 eyes because of partial extrusion

  10. Discussion (1/2) • Safe and efficient; improvement of UCVA+++ • Trend towards improved outcomes with single-segment Intacs® (more important reshaping of the cornea) • Results consistent with existent data (Sharma, 2005) • Cases of loss of vision may be attributed to an induced irregular astigmatism

  11. Discussion (2/2) Double-segment (preop/postop/differential) Superior and inferior flattening Superior steepening Single-segment (preop/postop/differential) Inferior flattening

  12. Conclusion • Intacs® implantation using IntraLase® FS 2 was safe and effective for treating keratoconus • Better results were achieved with single-segment Intacs® • Colin J, Cochener B, Savary G, Malet F, Holmes-Higgin D. INTACS inserts for treating keratoconus: one-year results. Ophthalmology 2001;108:1409-1414. • Siganos CS, Kymionis GD, Kartakis N, Theodorakis MA, Astyrakakis N, Pallikaris IG. Management of keratoconus with Intacs. Am J Ophthalmol 2003;135:64-70. • Alio JL, Artola A, Hassanein A, Haroun H, Galal A. One or 2 Intacs segments for the correction of keratoconus. J Cataract Refract Surg 2005;31:943-953. • Sharma M, Boxer Wachler BS. Comparison of single-segment and double-segment Intacs for keratoconus and post-LASIK ectasia. Am J Ophthalmol 2006;141:891-895. • Ertan A, Kamburoglu G. Intacs implantation using a femtosecond laser for management of keratoconus: Comparison of 306 cases in different stages. J Cataract Refract Surg 2008;34:1521-1526.

More Related