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Evaluation of a new nomogram for Ferrara ring segment implantation in keratoconus

International Journal of Ophthalmology(English edition) 2021年第9期14卷 1371-1383页

作者： Joaquín Fernández cristina peris-martínez Antonio Pérez-Rueda Sidi Mohamed Hamida Abdelkader María JoséRoig-Revert David P.Pinero Department of Ophthalmology(Qvision) Vithas Virgen del Mar HospitalAlmeria 04120Spain Department of Ophthalmology Torrecardenas Hospital ComplexAlmeria 04009Spain Comea and External Diseases Unit FISABIO-Oftalmologia Medica(FOM)Valencia 46015Spain Avino peris Eye Clinic Valencia 46001Spain Department of Surgery OphthalmologyUniversity of ValenciaValencia 46010Spain Department of Optics Pharmacologyand AnatomyUniversity of AlicanteAlicante 03690Spain

AIM:To evaluate the short-term clinical outcomes of Ferrara rings in keratoconus using an optimized nomogram developed after several years of research and retrospective analysis of clinical ***:This prospective longitudinal non-comparative clinical trial evaluated 88 eyes of 88 patients(age 18-62 y)with keratoconus diagnosis from two Spanish *** ring segment(AJL Ophthalmic)implantation was performed in all cases,using the mechanical procedure in 25 eyes(28.4%)and a femtosecond laser-assisted procedure in 63 eyes(71.6%).The ring segments implanted in each case were selected using a new optimized nomogram that considered variables such as anterior corneal asphericity and astigmatism or the discrepancy among astigmatism and coma ***,refractive,corneal topographic,aberrometric,and pachymetric changes after surgery were evaluated during a 3-month ***:The implants induced a significant refractive change as well as an improvement in uncorrected(UDVA)and corrected distance visual acuity(CDVA;P<0.001).Postoperative CDVA of 0.10 log MAR or better was achieved in 28.4%and 46.5%of eyes,*** eyes(2.3%)lost two or more lines of CDVA whereas a total of 53.5%of eyes gained lines of CDVA.A significant central anterior and posterior corneal flattening was induced(P≤0.003),with a significant reduction of anterior(P<0.001)and posterior corneal astigmatisms(P=0.048),and a change in anterior asphericity(P<0.001).Total primary coma(6 mm pupil)change was also statistically significant(preoperative 3.66±3.04μm vs postoperative 2.33±2.26μm,P<0.001).No significant differences were found in the effect of ring segments between cases implanted using the mechanical and femtosecond techniques(P≥0.101).CONCLUSION:The implantation of Ferrara rings based on the nomogram evaluated is safe and effective for promoting a visual rehabilitation in keratoconus,with a relevant control of primary coma aberration.

关键词： intracorneal ring segment Ferrara ring segment femtosecond keratoconus coma aberration

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Intracameral 5-fluorouracil and viscous dispersive viscoelastic for diffuse epithelial downgrowth management in aphakia

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International Journal of Ophthalmology(English edition) 2020年第5期13卷 845-847页

作者： Santiago Montolío-Marzo Ester Fernández-López Jose Vicente Piá-Ludena Juan María Davó-Cabrera Enrique Antonio Alfonso-Munoz cristina peris-martínez FISABIO Oftalmología Médica Valencia 46015Spain

Dear Editor,I am *** Montolío-Marzo from FISABIO Oftalmología Médica,Valencia,Spain.I write you to present a case report of epithelial downgrowth in an aphakic *** epithelial downgrowth is one of the most feared complications in cases of penetrating ocular trauma or recurrent ocular *** progress can affect all the ocular structures,giving rise to corneal decompensation,retinal detachment,difficult-to-treat glaucoma or phthisis bulbi and many cases end in enucleation[1].Fortunately,the incidence of this condition is very low,there being between 0.08%and 0.12%after cataract surgery and 0.25%after penetrating *** infrequency means that scientific evidence is reduced to case series and the opinions of experts without there being a homogeneous criterion to guide the work of the doctor in *** these reasons,epithelial downgrowth is still a diagnostic and therapeutic challenge.

关键词： viscoelastic viscous camera

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