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| 1 | Evaluation of anterior and posterior surfaces of the cornea using a dual Scheimpflug analyzer in keratoconus patients implanted with intrastromal corneal ring segments显示文摘AIM:To evaluate corneal parameters measured with a dual Scheimpflug analyzer in keratoconus patients implanted with intrastromal corneal ring segments(ICRS).METHODS:Fifty eyes of 40 keratoconus patients had Ferrara ICRS implantation from November 2010 to April2014.Uncorrected visual acuity(UCVA),best corrected visual acuity(BCVA),refraction,keratometry,asphericity,elevation,pachymetry,root mean square(RMS),spherical aberration and coma were studied.All patients were evaluated using a dual Scheimpflug system.RESULTS:The mean follow-up time after the procedure was 12.7mo.The mean UCVA improved from0.82 to 0.31(P<0.001);the mean BCVA improved from0.42 to 0.05(P<0.0001),the mean spherical refraction changed from-3.06 ±3.80 D to-0.80 ±2.5 D(P<0.0001)and the mean refraction astigmatism reduced from-4.51 ±2.08 D to-2.26±1.18 D(P<0.0001).The changes from preoperative to postoperative,in parameters of the anterior and posterior surface of the cornea,were statistically significant except the elevation posterior at the apex of the cornea and posterior asphericity.CONCLUSION:The implantation of Ferrara ICRS induces changes in both anterior and posterior surfaces of the cornea. | Leonardo Torquetti Carlos Arce Jesus Merayo-Lloves Guilherme Ferrara Paulo Ferrara Breenno Signorelli Armando Signorelli | 2016 | International Journal of Ophthalmology(English edition)2016，9，9： | 3 |
| 2 | Clinical outcomes after implantation of a new intrastromal corneal ring with 140-degree of arc in patients with corneal ectasia显示文摘AIM:To evaluate the clinical and tomographic outcomes after implantation of a new intrastromal corneal ring segment(ICRS) with 140-degrees of arc in eyes with corneal ectasia.METHODS:We evaluated patients with corneal ectasia implanted with Ferrara 140° ICRS from April 2010 to February 2015.Outcome measures included preoperative and postoperative corrected distance visual acuity(CDVA),keratometry simulated(K) reading,tomographic astigmatism and asphericity.All patients were evaluated using the Pentacam Scheimpflug system.RESULTS:The study evaluated 58 eyes.The mean followup was 16.81±10.8 mo.The CDVA(logM AR) improved from 0.5±0.20(20/60) to 0.3±0.21(20/40)(P<0.01).The average K reduced from 49.87±7.01 to 47.34±4.90 D(P<0.01).The asphericity changed from-0.60±0.86 to-0.23±0.67 D(P<0.01).The mean preoperative tomographic astigmatism decreased from-8.0±3.45 to-4.53±2.52 D(P<0.01).CONCLUSION:The new ICRS model with 140-degrees of arc effectively improve the visual acuity and reduce the high astigmatism usually found in patients with corneal ectasia. | Jordana Sandes Larissa R.S.Stival Marcos Pereira de Avila Paulo Ferrara Guilherme Ferrara Leopoldo Magacho Luana P.N.Araujo Leonardo Torquetti | 2018 | International Journal of Ophthalmology(English edition)2018，11，5： | 2 |
| 3 | Preliminary results of a new intrastromal corneal ring segment as a tissue saving procedure in photorefractive keratectomy to correct moderate to high myopia显示文摘AIM:To evaluate the clinical results after implantation of a new intrastromal corneal ring segment(ICRS)associated with photorefractive keratectomy(PRK)to correct high myopia(HM)patients with thin corneas.METHODS:We evaluated 42 eyes of 23 HM patients that had ICRS implantation followed by PRK.The mean age of patients was 29.1±7.12 y(range 18 to 40 years old).Uncorrected visual acuity(UCVA),best corrected visual acuity(BCVA),keratometry,spherical equivalent,pachymetry,and aberrometry were compared using ANOVA with repeated measurements evaluated preoperatively and at last follow-up visit after the procedures.The refractive predictability and simulated/real corneal ablation were also assessed.RESULTS:The mean follow-up time after PRK was 6.8±1.6 mo.The mean preoperative UCVA improved from 20/800 preoperative to 20/100 after ICRS and 20/35 after PRK.The mean preoperative BCVA was 20/25(range from 20/30 to 20/20)and remained unchanged after ICRS implantation.Following the PRK the mean BCVA was 20/25(range from 20/30 to 20/20).The mean spherical equivalent decreased from-7.25±1.12(range-5.00 to-9.00)preoperatively to-3.32±1.0(range-2.00 to-5.00)postoperatively(P<0.001)after ICRS implantation and decreased from-2.44±1.51 preoperatively to 0.32±0.45(range-0.625 to 0.875)postoperatively(P<0.001)after PRK.The change in BCVA and topographic astigmatism was statistically significant(P<0.0001).CONCLUSION:ICRS in HM associated with PRK can be a tissue saving procedure and an alternative surgical option for correction of moderate to high myopia. | Sandro Coscarelli Pablo Rodrigues Guilherme Rocha Leonardo Torquetti | 2020 | International Journal of Ophthalmology(English edition)2020，13，12： | 1 |
| 4 | Clinical outcomes after intrastromal corneal ring segments reoperation in keratoconus patients显示文摘AIM:To evaluate the clinical outcomes after Ferrara intrastromal corneal ring segments(ICRS)reoperation in patients with keratoconus.METHODS:A total of 37 keratoconus eyes implanted with intrastromal corneal ring segments,which had an ICRS exchange,addition,reposition or removal were evaluated.Uncorrected visual acuity(UCVA),best corrected visual acuity(BCVA),keratometry(K),asphericity(Q)and pachymetry at the thinnest point(PTP)of the cornea were evaluated using a corneal tomography(Oculus Pentacam,USA)RESULTS:The mean follow-up time after the reoperation was 30.5±9.7 months.The mean UCVA improved from 20/300 to 20/80(P=0.005);the mean BCVA improved from 20/160 to 20/50(P=0.0002),the mean keratometry reduced from 49.33±4.19D to 46.16±3.90D(P=0.0001),the mean pachymetry at the thinnest point increased from 450±42.9μm to 469±40.8μm(P=0.0001).The asphericity increased from-0.84±0.74 to-0.35±0.81(P=0.15)and the spherical equivalent reduced from-4.64±4.87D to-3.04±3.45D(P=0.137).The changes in the asphericity and spherical equivalent were not statistically significant.CONCLUSION:Ferrara ICRS implantation showed to be a reversible and readjustable surgical procedure for keratoconus treatment.Good outcomes can be obtained even after removal,addition,reposition or exchange of ICRS. | Lconardo Torquetti Guilherme Ferrara Franklin Almeida Leandro Cunha Paulo Ferrara Jesus Merayo-Lloves | 2013 | International Journal of Ophthalmology(English edition)2013，6，6： | 1 |
| 5 | DAPI diffusion after intravitreal injection of mesenchymal stem cells in the injured retina of rats 显示文摘 | Castanheira P Torquetti LT Magalhas DR | 2009 | Cell Transplant2009，18，4： | 1 |
| 6 | Retinal incorporation and differentiation of mesenchymal stem cells intravitreally injected in the injured retina of rats显示文摘 | Castanheira P Torquetti L Nehemy MB | | 0，，： | 1 |
| 7 | Retinal incor- poration and differentiation of mesenchymal stem cells intravit- really injected in the injured retina of rats显示文摘 | Castanheira P Torquetti L Nehemy MB Goes AM | 2008 | Arq Bras Offal- mol2008，71，5： | 1 |
| 8 | Femtosecond laser-assisted intrastro- mal corneal ring segment implantation for high astigmatism cor- rection after penetrating keratoplasty 显示文摘 | Lisa C Garcla-Fernondez M Madrid-Costa D Torquetti L Mer- ayo-Lloves J Alfonso JF | 2013 | J Cataract Refract Surg2013，39，11： | 1 |
| 9 | Long-term follow-up of intrastromal corneal ring segments in keratoconus显示文摘 | Torquetti L Berbel RF Ferrara P | | 0，，10： | 1 |
| 10 | Retinal incorporation and differentiation of mesenchymal stem cells intravitreally injected in the injured retina of rats显示文摘 | Castanheira P Torquetti L Nehemy MB | 2008 | Arq Bras Oftalmol2008，71，5： | 1 |
| 11 | Retinal incorporation and differentiation of mesenchymal stem cells intravitreally injected in the injured retina of rats显示文摘 | Castanheira P Torquetti L Nehemy MB | | 0，，： | 1 |
| 12 | Intrastromal corneal ring segments: visual outcomes from a large case series显示文摘 | Guilherme Ferrara Leonardo Torquetti Paulo Ferrara Jesús Merayo‐Lloves | 2012 | Clinical & Experimental Ophthalmology2012，，5： | 1 |
| 13 | Long-term follow-up of intrastromal corneal ring segments in keratoconus显示文摘 | Leonardo Torquetti Rodrigo Fabri Berbel Paulo Ferrara | 2009 | Journal of Cataract & Refractive Surgery2009，，10： | 1 |
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