Tehran University of Medical Sciences

Science Communicator Platform

Stay connected! Follow us on X network (Twitter):
Share this content! On (X network) By
Visual and Refractive Outcomes and Tomographic Changes After Femtosecond Laser-Assisted Intrastromal Corneal Ring Segment Implantation in Patients With Keratoconus Publisher



Hashemian S1, 4 ; Farshchian N1 ; Foroutamjazi A1 ; Jafari M2 ; Hashemian M3
Authors
Show Affiliations
Authors Affiliations
  1. 1. Eye Research Center, Rassoul Akram Hospital, Iran University of Medical Sciences, No. 86 10th Boostan St., Tehran, 16667, Iran
  2. 2. Iranian Eye Clinic, Tehran, Iran
  3. 3. School of Pharmacy, International Campus, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Shahid Beheshti University of Medical Sciences, Tehran, Iran

Source: Journal of Ophthalmic and Vision Research Published:2018


Abstract

Purpose: To evaluate the visual, refractive, and tomography changes after femtosecond laser-assisted intrastromal corneal ring segment (ICRS; Intacs® SK) implantation in patients with keratoconus. Methods: In this prospective interventional case series, Intacs SK ICRSs were inserted using a femtosecond laser into eyes with stage I-IV keratoconus. Visual, refractive, and corneal tomography changes, along with surgical complications, were analyzed 1 week, 2 months, and 6 months postoperatively. Results: The study evaluated 71 eyes of 52 patients (mean age: 27.5 years). Six months postoperatively, the spherical equivalent, mean sphere, and mean cylinder were decreased by 2.07, 1.47, and 1.13 diopters (D), respectively. The mean preoperative uncorrected distance visual acuity (UDVA) increased from 0.87 ± 0.26 to 0.46 ± 0.19 LogMAR and the mean preoperative corrected distance visual acuity (CDVA) increased from 0.55 ± 0.21 to 0.28 ± 0.17 LogMAR (P < 0.001). Flat and steep keratometry decreased by a mean corneal power in the 3-mm zone, and mean anterior elevation decreased by 0.91 D, 2.52 D, and 1.03 microns (P < 0.001), respectively. Among all eyes, 93.0% gained one or more lines of CDVA. Mean internal anterior chamber depth decreased from 3.25 ± 0.33 to 3.14 ± 0.45 mm (P = 0.001), and mean irregularity in the 3-mm zone decreased from 5.63 ± 1.71 to 5.24 ± 1.82 (P = 0.006). However, mean posterior elevation and irregularity in the 5-mm zone did not change significantly. Conclusion: Implantation of one or two Intacs SK segments is safe and effective to treat keratoconus, leading to significant improvement in UDVA, CDVA, and refractive error. © 2018 Journal of Ophthalmic and Vision Research.
Related Docs
View other Related Docs
1. Updates on Managements for Keratoconus, Journal of Current Ophthalmology (2018)
2. Intrastromal Corneal Ring Segment Implantation (Keraring 355°) in Patients With Central Keratoconus: 6-Month Follow-Up, Journal of Ophthalmology (2015)
3. Complete 360-Degree Intrastromal Corneal Rings With and Without Corneal Cross-Linking in the Management of Keratoconus, Keratoconus: Optical and Surgical Management (2024)
4. Visual, Keratometric and Corneal Biomechanical Changes After Intacs Sk Implantation for Moderate to Severe Keratoconus, Journal of Ophthalmic and Vision Research (2016)
5. Mini-Scleral Contact Lens for Management of Poor Visual Outcomes After Intrastromal Corneal Ring Segments Implantation in Keratoconus, Journal of Ophthalmic and Vision Research (2016)
6. Femtosecond-Assisted Intrastromal Corneal Single-Segment Ring Implantation in Patients With Keratoconus: A 12-Month Follow-Up, Eye and Contact Lens (2015)
7. Myoring Implantation in Keratoconic Patients: 3 Years Follow-Up Data, Journal of Ophthalmic and Vision Research (2016)
8. Clinical Outcomes of a New Type of Continuous Intrastromal Corneal Ring for Treatment of Keratoconus, Cornea (2022)
Experts (# of related papers)
View all Related Experts
Mehrdad Mohammadpour (5)
Masoud Khorrami-Nejad (4)
Other Related Docs
9. Intracorneal Ring Segment Depth in Keratoconus Patients: A Long-Term Follow-Up Study, International Ophthalmology (2018)
10. Long-Term Results of Myoring Implantation in Patients With Keratoconus, Clinical and Experimental Optometry (2021)
11. Myoring Implantation With and Without Corneal Collagen Crosslinking for the Management of Keratoconus, Journal of Ophthalmic and Vision Research (2020)
12. Outcome of Complete Intrastromal Ring Implantation Using Femtosecond Laser in Pellucid Marginal Degeneration, Eye (Basingstoke) (2015)
13. Comparison of Two Different 360-Degree Intrastromal Corneal Rings Combined With Simultaneous Accelerated-Corneal Cross-Linking, European Journal of Ophthalmology (2024)
14. Comparison of the Myoring Implantation Depth by Mechanical Dissection Using Pocketmaker Microkeratome Versus Melles Hook Via As-Oct, BMC Ophthalmology (2018)
15. Technique of Simultaneous Femtosecond Laser Assisted Myoring Implantation and Accelerated Intrastromal Collagen Cross-Linking for Management of Progressive Keratoconus: A Novel Technique, Contact Lens and Anterior Eye (2016)
16. Demographic Profile, Clinical, and Topographic Characteristics of Keratoconus Patients Attending at a Tertiary Eye Center, Journal of Current Ophthalmology (2019)
17. Additional Intrastromal Corneal Ring Segments in Keratoconus, Cornea (2018)
18. Long-Term Outcomes of a 360-Degree Intracorneal Ring Implantation for Keratoconus: A 10-Year Follow-Up, Cornea (2025)
19. Microbial Keratitis Following Intracorneal Ring Implantation, Clinical and Experimental Optometry (2019)