Outcomes of a Single-Segment Intrastromal Corneal Ring in Early Keratoconus and Early Pellucid Marginal Degeneration

Purpose To determine the effect of a single-segment intrastromal corneal ring segment (ICRS; Intacs SK) on early keratoconus (KCN) and pellucid marginal degeneration (PMD). Methods It is a prospective interventional study. One hundred twenty-four eyes (99 patients) with KCN and 36 eyes (26 patients)...

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Bibliographic Details
Published in:International ophthalmology 2022-10, Vol.42 (10), p.2987-2996
Main Authors: Hashemian, Seyed Javad, Abdolalizadeh, Parya, Ghiasian, Leila, Aghaei, Hossein, Hadavandkhani, Ali, Semnani, Fatemeh Nadjafi, Jafari, Mohammad Ebrahim, Hashemian, Seyed Mahyar, Hashemian, Mahsa Sadat
Format: Article
Language:English
Subjects:
Acuity
Astigmatism
Contact lenses
Cornea
Degeneration
Implantation
Irregularities
Keratoconus
Lasers
Medicine
Medicine & Public Health
Ophthalmology
Original Paper
Patients
Segments
Topography
Visual acuity
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Summary:Purpose To determine the effect of a single-segment intrastromal corneal ring segment (ICRS; Intacs SK) on early keratoconus (KCN) and pellucid marginal degeneration (PMD). Methods It is a prospective interventional study. One hundred twenty-four eyes (99 patients) with KCN and 36 eyes (26 patients) with PMD at early stage (the maximum keratometric reading less than 55 diopters) were included to ICRS implantation using femtosecond laser at a tertiary university-based hospital and a private outpatient center. The uncorrected distance and spectacle-corrected visual acuity (UDVA and SCDVA), manifest spherical and cylindrical refractions, and keratometry indices were measured preoperatively and postoperatively, 1 week, 2 and 6 months. Results One week after surgery, significant improvements were observed in UDVA, SCDVA, cylinder and keratometry readings of both KCN and PMD groups (all P  
ISSN:1573-2630
0165-5701
1573-2630
DOI:10.1007/s10792-022-02284-8