Cargando…

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

In order to determine the effect of intracorneal rings (Intacs SK), when implanted in keratoconic patients, on corneal curvature, Uncorrected Visual Acuity (UCVA), Best Corrected Visual Acuity (BCVA) and on the progression of the cone through three years follow-up period. In this prospective nonrand...

Descripción completa

Detalles Bibliográficos
Autores principales: A. Ibrahim, Tarek, Elmor, Osama
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Medical Hypothesis, Discovery & Innovation Ophthalmology 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3939749/
https://www.ncbi.nlm.nih.gov/pubmed/24600640
_version_ 1782305736707014656
author A. Ibrahim, Tarek
Elmor, Osama
author_facet A. Ibrahim, Tarek
Elmor, Osama
author_sort A. Ibrahim, Tarek
collection PubMed
description In order to determine the effect of intracorneal rings (Intacs SK), when implanted in keratoconic patients, on corneal curvature, Uncorrected Visual Acuity (UCVA), Best Corrected Visual Acuity (BCVA) and on the progression of the cone through three years follow-up period. In this prospective nonrandomized study 114 eyes of 71 keratoconic patients (38 females and 33 males) were implanted with Intacs SK. Incisions were always made in the steep meridian. UCVA, BCVA, Corneal Topography (TMS) were measured pre and postoperatively and at intervals of 1, 3, 6 & 12 months then yearly for 3 consecutive years. Preoperative mean k-reading was 52.53 and 48.18, 49.56, 49.17, 48.51, 48.15 & 48.01 at 1, 3, 6, 12, 24 & 36 months postoperatively (P‹0.01). In terms of UCVA, 15.64% of patients gained more than 3 lines and 69.73% gained 1-3 lines with a total of 85.37% of patients gaining lines compared to their preoperative UCVA (P‹0.01) while 14.63% of cases did not gain any lines at 1 month postoperative. At three months postoperatively, 12.64% gained more than 3 lines, 71.15% gained 1-3 lines with a total of 83.79% while 16.21% did not gain any lines. Three years postoperative 11.82% of cases gained more than 3 lines, 73.23% gained 1-3 lines with a total of 85.05% while 14.95% did not gain any lines (P‹0.01). With regard to BCVA, 19.73% gained more than 3 lines, 68.26% gained 1-3 lines with a total of 87.99% of cases gaining lines compared to their preoperative BCVA (P‹0.01) while 12.01% did not gained any lines at 1 month postoperative. At three months postoperatively, 14.96% gained more than 3 lines, 70.19% gained 1-3 lines with a total of 85.15% while 14.85% did not gain any lines. Three years postoperative, 12.17% gained more than 3 lines, 71.78% gained 1-3 lines with a total of 83.95% (P‹0.01) while 16.05% did not gain any lines. No eyes lost any lines as it pertained to UCVA & BCVA. Despite the fluctuation of k-readings, UCVA and BCVA in the first 3 months, which may represent the time needed to stabilize the cone, UCVA and BCVA were improved and maintained throughout the study. Patient selection remains the key point for the success of intacs in keratoconic patients.
format Online
Article
Text
id pubmed-3939749
institution National Center for Biotechnology Information
language English
publishDate 2013
publisher Medical Hypothesis, Discovery & Innovation Ophthalmology
record_format MEDLINE/PubMed
spelling pubmed-39397492014-03-05 Intracorneal Rings (INTACS SK) Might be Beneficial in Keratoconus; A Prospective Nonrandomized Study A. Ibrahim, Tarek Elmor, Osama Med Hypothesis Discov Innov Ophthalmol Original Study In order to determine the effect of intracorneal rings (Intacs SK), when implanted in keratoconic patients, on corneal curvature, Uncorrected Visual Acuity (UCVA), Best Corrected Visual Acuity (BCVA) and on the progression of the cone through three years follow-up period. In this prospective nonrandomized study 114 eyes of 71 keratoconic patients (38 females and 33 males) were implanted with Intacs SK. Incisions were always made in the steep meridian. UCVA, BCVA, Corneal Topography (TMS) were measured pre and postoperatively and at intervals of 1, 3, 6 & 12 months then yearly for 3 consecutive years. Preoperative mean k-reading was 52.53 and 48.18, 49.56, 49.17, 48.51, 48.15 & 48.01 at 1, 3, 6, 12, 24 & 36 months postoperatively (P‹0.01). In terms of UCVA, 15.64% of patients gained more than 3 lines and 69.73% gained 1-3 lines with a total of 85.37% of patients gaining lines compared to their preoperative UCVA (P‹0.01) while 14.63% of cases did not gain any lines at 1 month postoperative. At three months postoperatively, 12.64% gained more than 3 lines, 71.15% gained 1-3 lines with a total of 83.79% while 16.21% did not gain any lines. Three years postoperative 11.82% of cases gained more than 3 lines, 73.23% gained 1-3 lines with a total of 85.05% while 14.95% did not gain any lines (P‹0.01). With regard to BCVA, 19.73% gained more than 3 lines, 68.26% gained 1-3 lines with a total of 87.99% of cases gaining lines compared to their preoperative BCVA (P‹0.01) while 12.01% did not gained any lines at 1 month postoperative. At three months postoperatively, 14.96% gained more than 3 lines, 70.19% gained 1-3 lines with a total of 85.15% while 14.85% did not gain any lines. Three years postoperative, 12.17% gained more than 3 lines, 71.78% gained 1-3 lines with a total of 83.95% (P‹0.01) while 16.05% did not gain any lines. No eyes lost any lines as it pertained to UCVA & BCVA. Despite the fluctuation of k-readings, UCVA and BCVA in the first 3 months, which may represent the time needed to stabilize the cone, UCVA and BCVA were improved and maintained throughout the study. Patient selection remains the key point for the success of intacs in keratoconic patients. Medical Hypothesis, Discovery & Innovation Ophthalmology 2013 /pmc/articles/PMC3939749/ /pubmed/24600640 Text en © 2013, Medical Hypothesis, Discovery & Innovation (MEHDI) Ophthalmology Journal This is an Open Access article distributed under the terms of the Creative Commons Attribution License, (http://creativecommons.org/licenses/by/3.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Study
A. Ibrahim, Tarek
Elmor, Osama
Intracorneal Rings (INTACS SK) Might be Beneficial in Keratoconus; A Prospective Nonrandomized Study
title Intracorneal Rings (INTACS SK) Might be Beneficial in Keratoconus; A Prospective Nonrandomized Study
title_full Intracorneal Rings (INTACS SK) Might be Beneficial in Keratoconus; A Prospective Nonrandomized Study
title_fullStr Intracorneal Rings (INTACS SK) Might be Beneficial in Keratoconus; A Prospective Nonrandomized Study
title_full_unstemmed Intracorneal Rings (INTACS SK) Might be Beneficial in Keratoconus; A Prospective Nonrandomized Study
title_short Intracorneal Rings (INTACS SK) Might be Beneficial in Keratoconus; A Prospective Nonrandomized Study
title_sort intracorneal rings (intacs sk) might be beneficial in keratoconus; a prospective nonrandomized study
topic Original Study
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3939749/
https://www.ncbi.nlm.nih.gov/pubmed/24600640
work_keys_str_mv AT aibrahimtarek intracornealringsintacsskmightbebeneficialinkeratoconusaprospectivenonrandomizedstudy
AT elmorosama intracornealringsintacsskmightbebeneficialinkeratoconusaprospectivenonrandomizedstudy