Double intrastromal corneal ring segment implantation: a new approach for improved clinical outcomes in keratoconus patients  

作　　者：Sandro Coscarelli Reinaldo de Oliveira Sieiro Victoria Moreira Fernandes Sandro P.Coscarelli Leonardo Torquetti 

机构地区：[1]Ennio Coscarelli Eye Clinic,Belo Horizonte 30140-001,Brazil [2]Medical Sciences of Minas Gerais Eye Institute,Belo Horizonte 30260-080,Brazil [3]Faculty of Medical Sciences of Minas Gerais,Belo Horizonte 30260-080,Brazil [4]Center of Excellence in Ophthalmology,Paráde Minas 35660-017,Brazil

出　　处：《International Journal of Ophthalmology(English edition)》2024年第11期2023-2030,共8页国际眼科杂志（英文版）

摘　　要：AIM:To evaluate the clinical outcomes after subsequent implantation of a new intrastromal corneal ring segment(ICRS)model followed by an additional short-arc ICRS implant in keratoconus patients.METHODS:This retrospective single-arm cohort study evaluated 25 eyes of 21 keratoconus patients implanted with the new ICRS followed by 140-arch length ICRS(140-ICRS)implantation.Uncorrected distance visual acuity(UDVA,logMAR),corrected distance visual acuity(CDVA,logMAR),sphere,astigmatism,keratometry,spherical equivalent(SE),and asphericity were compared preoperatively and postoperatively after both ICRS implantation.RESULTS:The average follow-up time after 140-ICRS implantation was 6.40±2.20mo.The mean preoperative UDVA improved from 1.27±0.14 preoperative to 0.52±0.26 after both ICRS implantation(P=0.03).The mean sphere value reduced from-5.34±2.74 preoperatively to-2.06±1.84 postoperatively(P<0.001)after the first ICRS implantation and decreased to-0.59±1.54 postoperatively(P<0.001)after 140-ICRS implantation.The mean preoperative astigmatism was-3.72±1.56 and improved to-2.82±1.08 after the first ICRS implantation,and following the 140-ICRS implantation,the mean astigmatism was-1.37±0.67(P=0.001).The SE and asphericity changes were statistically significant(P<0.001).The researchers did not find intraoperative or postoperative complications for both procedures.CONCLUSION:The combination of 2 different ICRSs can efficiently regularize the cornea,reduce the SE,and improve visual acuity in selected keratoconus patients.

关 键 词：KERATOCONUS CORNEA intrastromal corneal ring segments refractive surgery 

分 类 号：R779.6[医药卫生—眼科]