Abstract | OBJECTIVE: To prospectively study the effects of the use of Intacs microthin prescription inserts (Addition Technology Inc, Fremont, Calif) for the postoperative management of corneal ectasia resulting from laser in situ keratomileusis ( LASIK). METHODS: In this prospective nonrandomized clinical trial, 10 eyes of 7 patients with post- LASIK corneal ectasia (2 men and 5 women) aged 33 to 46 years (mean +/- SD, 40.67 +/- 5.99 years) were included. The follow-up ranged from 6 to 24 months (mean +/- SD, 15.0 +/- 6.5 months). Two Intacs segments of thickness depending on the residual refraction of the patients were inserted in each eye. MAIN OUTCOME MEASURES: Uncorrected visual acuity, best spectacle-corrected visual acuity, refractive outcome, and topographic findings after Intacs implantation. RESULTS: Intacs were successfully implanted in all eyes. Spherical equivalent error was statistically significantly reduced after Intacs implantation (pre-Intacs, mean +/- SD: -4.81 +/- 3.24 Diopters (D) (range, -13.75 to -2.50 D) to -0.96 +/- 2.93 D (range, -8.75 to 2.50 D) (P<.001). Pre-Intacs uncorrected visual acuity was 20/100 or worse in all eyes (range, counting fingers to 20/100) while at the last follow-up examination, 9 (90%) of 10 eyes had uncorrected visual acuity of 20/40 or better (range, counting fingers to 20/20). Three eyes maintained the pre-Intacs best spectacle-corrected visual acuity while the rest of the eyes (7) experienced a gain of 1 to 2 lines. The mean difference between pre-Intacs and last follow-up best spectacle-corrected visual acuity was a gain of 1.00 +/- 0.82 lines. CONCLUSIONS: Intracorneal ring segments implantation improved uncorrected visual acuity and best spectacle-corrected visual acuity in patients with post- LASIK ectasia. Even though the results are encouraging, concern still exists regarding the long-term effect of such an approach for the management of post- LASIK ectasia.
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Authors | George D Kymionis, Charalambos S Siganos, George Kounis, Nikolaos Astyrakakis, Maria I Kalyvianaki, Ioannis G Pallikaris |
Journal | Archives of ophthalmology (Chicago, Ill. : 1960)
(Arch Ophthalmol)
Vol. 121
Issue 3
Pg. 322-6
(Mar 2003)
ISSN: 0003-9950 [Print] United States |
PMID | 12617700
(Publication Type: Clinical Trial, Journal Article)
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Topics |
- Adult
- Cornea
(pathology, surgery)
- Corneal Diseases
(etiology, surgery)
- Corneal Topography
- Dilatation, Pathologic
- Eyeglasses
- Female
- Follow-Up Studies
- Humans
- Keratomileusis, Laser In Situ
(adverse effects)
- Male
- Middle Aged
- Postoperative Complications
(surgery)
- Prospective Studies
- Prostheses and Implants
- Prosthesis Implantation
(methods)
- Refraction, Ocular
- Safety
- Visual Acuity
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