Pub Date : 2021-11-21DOI: 10.1007/978-3-030-84506-3_8
E. A. Torres-Netto, M. Hosny, F. Hafezi
{"title":"Corneal Cross-Linking at the Slit Lamp","authors":"E. A. Torres-Netto, M. Hosny, F. Hafezi","doi":"10.1007/978-3-030-84506-3_8","DOIUrl":"https://doi.org/10.1007/978-3-030-84506-3_8","url":null,"abstract":"","PeriodicalId":92051,"journal":{"name":"International journal of keratoconus and ectatic corneal diseases","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86911075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-21DOI: 10.1007/978-3-030-84506-3_14
L. Mastropasqua, M. Nubile, M. Lanzini
{"title":"SLAK: Stromal Lanticule Addition Keratoplasty","authors":"L. Mastropasqua, M. Nubile, M. Lanzini","doi":"10.1007/978-3-030-84506-3_14","DOIUrl":"https://doi.org/10.1007/978-3-030-84506-3_14","url":null,"abstract":"","PeriodicalId":92051,"journal":{"name":"International journal of keratoconus and ectatic corneal diseases","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74337256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-22DOI: 10.5005/JP-JOURNALS-10025-1180
O. Özalp, E. Atalay, N. Yıldırım
To report an unusual case of a newly diagnosed bilateral superior keratoconus in an elderly patient. We report a case of bilateral superior keratoconus in a 64-year-old woman who was diagnosed after having presented with hydrops in one eye. Uncorrected visual acuity was counting fingers from 3 and 1 meter for the right and left eyes, respectively. A superiorly located deep stromal scar and chronic corneal edema consistent with a diagnosis of corneal hydrops were noted for the left eye. Although the cornea was clear, there was superior corneal protrusion in the right eye. Pentacam and Orbscan demonstrated overlapping focal corneal thinning, increased back elevation, and steepening in the superior cornea. Anterior segment optical coherence tomography (AS-OCT) showed stromal and epithelial thinning in the superior cornea and significant compensatory epithelial thickening in the opposing quadrant. In light of these findings, a diagnosis of superior keratoconus was established. Superior keratoconus is a rare condition. Meticulous evaluation of corneal tomography and epithelial thickness profile is crucial for localizing the superior cone in keratoconus. This is the first case report demonstrating epithelial thickness profile in a superior keratoconus case. Özalp O, Atalay E, Yıldırım N. A Case of True Superior Keratoconus Confirmed Using Multiple Imaging Modalities. Int J Kerat Ect Cor Dis 2019;8(2):43–45.
报告一例新诊断为双侧上圆锥角膜的老年患者。我们报告一个病例的双侧上圆锥角膜在64岁的妇女谁是诊断后，提出了一个眼睛积液。未矫正视力为右眼和左眼分别从3米和1米数手指。左眼可见位置优越的深间质瘢痕和慢性角膜水肿，符合角膜积液的诊断。右眼角膜虽清晰，但有角膜上突。Pentacam和Orbscan显示重叠局灶性角膜变薄，后抬高增加，上角膜变陡。前段光学相干断层扫描(AS-OCT)显示上角膜间质和上皮变薄，对象限代偿性上皮明显增厚。根据这些发现，诊断为上圆锥角膜。上圆锥角膜是一种罕见的疾病。仔细评估角膜断层扫描和上皮厚度分布对圆锥角膜上锥的定位至关重要。这是第一例报告显示上圆锥角膜的上皮厚度。Özalp O, Atalay E, Yıldırım N. 1例真性上圆锥角膜的多重影像学检查。中华医学杂志，2019;8(2):43-45。
{"title":"A Case of True Superior Keratoconus Confirmed Using Multiple Imaging Modalities","authors":"O. Özalp, E. Atalay, N. Yıldırım","doi":"10.5005/JP-JOURNALS-10025-1180","DOIUrl":"https://doi.org/10.5005/JP-JOURNALS-10025-1180","url":null,"abstract":"\u0000\u0000\u0000To report an unusual case of a newly diagnosed bilateral superior keratoconus in an elderly patient.\u0000\u0000\u0000\u0000We report a case of bilateral superior keratoconus in a 64-year-old woman who was diagnosed after having presented with hydrops in one eye.\u0000\u0000\u0000\u0000Uncorrected visual acuity was counting fingers from 3 and 1 meter for the right and left eyes, respectively. A superiorly located deep stromal scar and chronic corneal edema consistent with a diagnosis of corneal hydrops were noted for the left eye. Although the cornea was clear, there was superior corneal protrusion in the right eye. Pentacam and Orbscan demonstrated overlapping focal corneal thinning, increased back elevation, and steepening in the superior cornea. Anterior segment optical coherence tomography (AS-OCT) showed stromal and epithelial thinning in the superior cornea and significant compensatory epithelial thickening in the opposing quadrant. In light of these findings, a diagnosis of superior keratoconus was established.\u0000\u0000\u0000\u0000Superior keratoconus is a rare condition. Meticulous evaluation of corneal tomography and epithelial thickness profile is crucial for localizing the superior cone in keratoconus.\u0000\u0000\u0000\u0000This is the first case report demonstrating epithelial thickness profile in a superior keratoconus case.\u0000\u0000Özalp O, Atalay E, Yıldırım N. A Case of True Superior Keratoconus Confirmed Using Multiple Imaging Modalities. Int J Kerat Ect Cor Dis 2019;8(2):43–45.\u0000","PeriodicalId":92051,"journal":{"name":"International journal of keratoconus and ectatic corneal diseases","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47799981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-22DOI: 10.5005/JP-JOURNALS-10025-1181
M. Abbondanza, G. Abbondanza, V. D. Felice
To present and discuss the outcomes of the mini asymmetric radial keratotomy (MARK) and corneal cross-linking (CXL) combined intervention, also known as the “Rome protocol”, for patients with progressive stage I, II, and III keratoconus (KC) and contact lens intolerance (CLI). Retrospective, observational study. The postoperative outcomes of 48 eyes (35 patients) were selected and retrospectively analyzed, with an average follow-up of 3.8 years. To assess the efficacy of the MARK plus CXL combined protocol, mean keratometry, mean pachymetry, and best spectacle-corrected visual acuity were evaluated. Mean keratometry improved in 90% of cases (from 48.3 D to 45 D), mean pachymetry improved in 83% of cases (from 439 to 460 μm), and best spectacle-corrected visual acuity improved in all cases (from +0.4 to +0.15 logMAR). The MARK plus CXL intervention effectively halted the KC progression and improved the visual acuity, which suggests that this combined procedure should be taken into account when considering refractive procedures combined with corneal cross-linking (CXL plus), if the relevant inclusion criteria can be satisfied. Abbondanza M, Abbondanza G, De Felice V. Mini Asymmetric Radial Keratotomy and Corneal Cross-linking for the Treatment and the Optical Rehabilitation of Keratoconus. Int J Kerat Ect Cor Dis 2019;8(2):35–39.
{"title":"Mini Asymmetric Radial Keratotomy and Corneal Cross-linking for the Treatment and the Optical Rehabilitation of Keratoconus","authors":"M. Abbondanza, G. Abbondanza, V. D. Felice","doi":"10.5005/JP-JOURNALS-10025-1181","DOIUrl":"https://doi.org/10.5005/JP-JOURNALS-10025-1181","url":null,"abstract":"\u0000\u0000\u0000To present and discuss the outcomes of the mini asymmetric radial keratotomy (MARK) and corneal cross-linking (CXL) combined intervention, also known as the “Rome protocol”, for patients with progressive stage I, II, and III keratoconus (KC) and contact lens intolerance (CLI).\u0000\u0000\u0000\u0000Retrospective, observational study.\u0000\u0000\u0000\u0000The postoperative outcomes of 48 eyes (35 patients) were selected and retrospectively analyzed, with an average follow-up of 3.8 years. To assess the efficacy of the MARK plus CXL combined protocol, mean keratometry, mean pachymetry, and best spectacle-corrected visual acuity were evaluated.\u0000\u0000\u0000\u0000Mean keratometry improved in 90% of cases (from 48.3 D to 45 D), mean pachymetry improved in 83% of cases (from 439 to 460 μm), and best spectacle-corrected visual acuity improved in all cases (from +0.4 to +0.15 logMAR).\u0000\u0000\u0000\u0000The MARK plus CXL intervention effectively halted the KC progression and improved the visual acuity, which suggests that this combined procedure should be taken into account when considering refractive procedures combined with corneal cross-linking (CXL plus), if the relevant inclusion criteria can be satisfied.\u0000\u0000Abbondanza M, Abbondanza G, De Felice V. Mini Asymmetric Radial Keratotomy and Corneal Cross-linking for the Treatment and the Optical Rehabilitation of Keratoconus. Int J Kerat Ect Cor Dis 2019;8(2):35–39.\u0000","PeriodicalId":92051,"journal":{"name":"International journal of keratoconus and ectatic corneal diseases","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44643074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-22DOI: 10.5005/JP-JOURNALS-10025-1183
J. McKelvie, D. A. Scott, G. A. Wilson
Ab s t r Ac t Aim: The aim of the study is to report a case of pregnancy-associated progressive keratoconus with atypical horizontally aligned Vogt’s striae. Background: Hormonal changes during pregnancy have been proposed as a risk factor for progressive keratoconus. There have been only a few cases of progressive keratoconus diagnosed with progression after pregnancy, without either an existing disease or an attributable cause. Case description: A 36-year-old New Zealand European woman presented with progressive myopic astigmatism following her first pregnancy. Stigmata of keratoconus were present on clinical examination and included horizontally aligned Vogt’s striae. Tomography measurements confirmed the diagnosis with characteristic inferior corneal steepening and ectasia bilaterally. The patient was advised to abstain from eye rubbing, commenced topical olopatadine, and underwent corneal collagen cross-linking following delivery to prevent further keratoconus progression. Conclusion: Pregnancy-associated progressive keratoconus in a 36-year-old woman was documented after the pregnancy. Clinical significance: Atypical presentation features that include horizontally aligned Vogt’s striae, advanced age at diagnosis, and rapid pregnancy-associated progression in a previously stable patient.
Ab s t r Ac t目的：本研究的目的是报告一例妊娠相关进行性圆锥角膜伴非典型水平排列的Vogt纹。背景：妊娠期间的激素变化被认为是进行性圆锥角膜的危险因素。只有少数进展性圆锥角膜在怀孕后被诊断为进展，没有现有疾病或可归因的原因。病例描述：一名36岁的新西兰欧洲妇女在第一次怀孕后出现进行性近视散光。临床检查发现圆锥角膜的污斑，包括水平排列的Vogt纹。体层摄影测量证实诊断为特征性下角膜变陡和双侧扩张。建议患者停止揉眼，开始外用奥洛帕坦，并在分娩后进行角膜胶原交联，以防止圆锥角膜的进一步发展。结论：一名36岁女性在妊娠后出现妊娠相关进行性圆锥角膜。临床意义：不典型的表现特征，包括水平排列的Vogt纹、诊断时的高龄以及先前稳定患者的妊娠相关快速进展。
{"title":"Pregnancy-associated New-onset Progressive Keratoconus with Horizontally Aligned Vogt's Striae in a 36-year-old Female","authors":"J. McKelvie, D. A. Scott, G. A. Wilson","doi":"10.5005/JP-JOURNALS-10025-1183","DOIUrl":"https://doi.org/10.5005/JP-JOURNALS-10025-1183","url":null,"abstract":"Ab s t r Ac t Aim: The aim of the study is to report a case of pregnancy-associated progressive keratoconus with atypical horizontally aligned Vogt’s striae. Background: Hormonal changes during pregnancy have been proposed as a risk factor for progressive keratoconus. There have been only a few cases of progressive keratoconus diagnosed with progression after pregnancy, without either an existing disease or an attributable cause. Case description: A 36-year-old New Zealand European woman presented with progressive myopic astigmatism following her first pregnancy. Stigmata of keratoconus were present on clinical examination and included horizontally aligned Vogt’s striae. Tomography measurements confirmed the diagnosis with characteristic inferior corneal steepening and ectasia bilaterally. The patient was advised to abstain from eye rubbing, commenced topical olopatadine, and underwent corneal collagen cross-linking following delivery to prevent further keratoconus progression. Conclusion: Pregnancy-associated progressive keratoconus in a 36-year-old woman was documented after the pregnancy. Clinical significance: Atypical presentation features that include horizontally aligned Vogt’s striae, advanced age at diagnosis, and rapid pregnancy-associated progression in a previously stable patient.","PeriodicalId":92051,"journal":{"name":"International journal of keratoconus and ectatic corneal diseases","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46837885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-22DOI: 10.5005/JP-JOURNALS-10025-1184
P. Rodrigues, N. Carvalho, Thaiane F Guerra, Cristiane F Moutinho, Françuilner S dos Santos, R. Miyashiro, Rosangela A Simoncelli, B. Moscovici
This study aimed at assessing the therapeutic decisions made by an individual keratoconus specialist in the last 10 years, to treat patients with keratoconus. We studied a case series and the descriptive analysis of individual cases treated by a single keratoconus specialist. Medical records of 636 patients totaling 1271 eyes were evaluated based on the therapeutic procedure used. For the treatment of keratoconus, the specialist chose expectant (only spectacles) in 22.3% of the cases, contact lenses in 39.3%, implantation of intrastromal corneal ring segments (ICRS) in 27.7%, cross-linking in 0.9%, and penetrating keratoplasty in 8.5% of the cases. The keratoconus specialist preferred noninvasive therapeutic options to improve vision quality, such as spectacles and contact lenses. Show the therapeutic preferences of a keratoconus specialist in order to compare with the daily practice. Carvalho N, Guerra TF, Moutinho CF, et al. Therapeutic Analysis in Patients with Keratoconus. Int J Kerat Ect Cor Dis 2019;8(2):40–42.
本研究旨在评估圆锥角膜专科医生在过去10年中对圆锥角膜患者的治疗决策。我们研究了由一位圆锥角膜专科医生治疗的病例系列和个体病例的描述性分析。根据所采用的治疗方法，对636例患者共计1271只眼的医疗记录进行了评估。对于圆锥角膜的治疗，专科医生选择期待(仅戴眼镜)的占22.3%，隐形眼镜占39.3%，角膜间环段植入术占27.7%，交联术占0.9%，穿透性角膜移植术占8.5%。圆锥角膜专家更倾向于非侵入性治疗方案，如眼镜和隐形眼镜，以提高视力质量。显示圆锥角膜专科医生的治疗偏好，以便与日常实践进行比较。Carvalho N, Guerra TF, Moutinho CF，等。圆锥角膜的治疗分析。中华医学杂志，2019;8(2):40-42。
{"title":"Therapeutic Analysis in Patients with Keratoconus","authors":"P. Rodrigues, N. Carvalho, Thaiane F Guerra, Cristiane F Moutinho, Françuilner S dos Santos, R. Miyashiro, Rosangela A Simoncelli, B. Moscovici","doi":"10.5005/JP-JOURNALS-10025-1184","DOIUrl":"https://doi.org/10.5005/JP-JOURNALS-10025-1184","url":null,"abstract":"\u0000\u0000\u0000This study aimed at assessing the therapeutic decisions made by an individual keratoconus specialist in the last 10 years, to treat patients with keratoconus.\u0000\u0000\u0000\u0000We studied a case series and the descriptive analysis of individual cases treated by a single keratoconus specialist. Medical records of 636 patients totaling 1271 eyes were evaluated based on the therapeutic procedure used.\u0000\u0000\u0000\u0000For the treatment of keratoconus, the specialist chose expectant (only spectacles) in 22.3% of the cases, contact lenses in 39.3%, implantation of intrastromal corneal ring segments (ICRS) in 27.7%, cross-linking in 0.9%, and penetrating keratoplasty in 8.5% of the cases.\u0000\u0000\u0000\u0000The keratoconus specialist preferred noninvasive therapeutic options to improve vision quality, such as spectacles and contact lenses.\u0000\u0000\u0000\u0000Show the therapeutic preferences of a keratoconus specialist in order to compare with the daily practice.\u0000\u0000Carvalho N, Guerra TF, Moutinho CF, et al. Therapeutic Analysis in Patients with Keratoconus. Int J Kerat Ect Cor Dis 2019;8(2):40–42.\u0000","PeriodicalId":92051,"journal":{"name":"International journal of keratoconus and ectatic corneal diseases","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43302203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-22DOI: 10.5005/JP-JOURNALS-10025-1182
Abraham Kurian, Iodine Reghunadhan, Manoj Soman, Mohammed Shahbaaz, Unnikrishnan Nair
To report a case of acute hydrops with a large stromal cleft, in a case of keratoconus, managed with compression sutures and perfluoropropane (C3F8) descemetopexy and subsequent management of corneal vascularization in that eye with combination therapy of laser and anti-vascular endothelial growth factor (anti-VEGF). Acute hydrops in keratoconus occurs following a tear or rupture in the Descemet's membrane (DM), resulting in aqueous percolating into the stroma. The presence of large stromal clefts in acute hydrops has been described as a known risk factor for delayed resolution and persistent edema, which in turn can incite inflammation and vascularization and thereby adversely affect the chances of graft survival later. We describe such a case managed effectively with a combination of different treatment modalities. A 12-year-old boy with keratoconus presented with acute hydrops in his left eye. The acute hydrops was managed with compression sutures along with C3F8 descemetopexy. Subsequent development of persistent deep corneal vascularization and recurrence of inflammation after the resolution of hydrops was managed with a combination of argon laser photocoagulation and intrastromal anti-VEGF injections, resulting in complete regression of the deep vascularization and resolution of inflammation. In our case, a combination of management modalities to address severe acute hydrops and its subsequent complications resulted in complete regression of the superficial and deep vessels, thus heralding an optimal outcome for a future corneal graft. There are no definite guidelines for the management of acute hydrops in keratoconus. A customized and judicious combination of various treatment modalities described in the literature for acute hydrops and its sequelae can result in an accepted outcome, which can pave the way for an optimum result with elective treatments like keratoplasty later on. Kurian A, Reghunadhan I, Soman M, et al. Regression of Corneal Vascularization Occurring after Corneal Suturing in a Case of Acute Hydrops Managed with a Combination Therapy of Argon Laser Photocoagulation and Intrastromal Ranibizumab Injection: A Case Report. Int J Kerat Ect Cor Dis 2019;8(2):46–49.
{"title":"Regression of Corneal Vascularization Occurring after Corneal Suturing in a Case of Acute Hydrops Managed with a Combination Therapy of Argon Laser Photocoagulation and Intrastromal Ranibizumab Injection: A Case Report","authors":"Abraham Kurian, Iodine Reghunadhan, Manoj Soman, Mohammed Shahbaaz, Unnikrishnan Nair","doi":"10.5005/JP-JOURNALS-10025-1182","DOIUrl":"https://doi.org/10.5005/JP-JOURNALS-10025-1182","url":null,"abstract":"To report a case of acute hydrops with a large stromal cleft, in a case of keratoconus, managed with compression sutures and perfluoropropane (C3F8) descemetopexy and subsequent management of corneal vascularization in that eye with combination therapy of laser and anti-vascular endothelial growth factor (anti-VEGF).\u0000\u0000\u0000\u0000Acute hydrops in keratoconus occurs following a tear or rupture in the Descemet's membrane (DM), resulting in aqueous percolating into the stroma. The presence of large stromal clefts in acute hydrops has been described as a known risk factor for delayed resolution and persistent edema, which in turn can incite inflammation and vascularization and thereby adversely affect the chances of graft survival later. We describe such a case managed effectively with a combination of different treatment modalities.\u0000\u0000\u0000\u0000A 12-year-old boy with keratoconus presented with acute hydrops in his left eye. The acute hydrops was managed with compression sutures along with C3F8 descemetopexy. Subsequent development of persistent deep corneal vascularization and recurrence of inflammation after the resolution of hydrops was managed with a combination of argon laser photocoagulation and intrastromal anti-VEGF injections, resulting in complete regression of the deep vascularization and resolution of inflammation.\u0000\u0000\u0000\u0000In our case, a combination of management modalities to address severe acute hydrops and its subsequent complications resulted in complete regression of the superficial and deep vessels, thus heralding an optimal outcome for a future corneal graft.\u0000\u0000\u0000\u0000There are no definite guidelines for the management of acute hydrops in keratoconus. A customized and judicious combination of various treatment modalities described in the literature for acute hydrops and its sequelae can result in an accepted outcome, which can pave the way for an optimum result with elective treatments like keratoplasty later on.\u0000\u0000Kurian A, Reghunadhan I, Soman M, et al. Regression of Corneal Vascularization Occurring after Corneal Suturing in a Case of Acute Hydrops Managed with a Combination Therapy of Argon Laser Photocoagulation and Intrastromal Ranibizumab Injection: A Case Report. Int J Kerat Ect Cor Dis 2019;8(2):46–49.","PeriodicalId":92051,"journal":{"name":"International journal of keratoconus and ectatic corneal diseases","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47524767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-06-01DOI: 10.5005/jp-journals-10025-1177
D. P. Llorens, Esteban Caravaca-Arens, Vicente J. Camps, R. Fikry, Verónica Mateo, Fady E. Labib, M. T. Caballero
Purpose: To obtain an expression of the adjusted IOL power (PIOLadj) in keratoconus eyes associated with minimal errors in IOL power calculation. Materials and methods: This retrospective study included a total of 25 eyes of 25 patients with ages ranging from 20 years to 76 years. The following IOLs were implanted: Acrysof IQ Toric, Acrysof SA60AT in 9 eyes, Sensar in 3 eyes, Tecnis 1 in 4 eyes, and Tecnis Toric in 2 eyes. The PIOLadj is based on Gauss equations, using adjusted keratometric index (nkadj) specific to keratoconus eyes. From this nkadj, an adjusted keratometric corneal power is calculated (Pkadj). The PIOLadj calculation was performed after estimating the effective lens position (ELP) using a mathematical expression obtained by multiple regression analysis (named ELPadj). Comparison between the PIOLadj and the real intraocular power implanted in each patient (PIOLreal) was carried out. Results: No significant differences between PIOLreal and PIOLadj were found. However, differences could be clinically relevant up to of 2.54 D as PIOLreal increases. But, in the range of PIOLreal between 0 and 20 D, differences were lower than 1.5 D, being most of them below 1 D. Conclusion: A new formula of IOL power calculation (PIOLadj) based on the use of an adjusted keratometric power (Pkadj) that considers a variable keratometric index due to the influence of the posterior corneal surface (nkadj) and adjusted effective lens position (ELPadj) is useful for estimating IOL power in low-to-moderate keratoconus, with more limitation in the most advanced keratoconus.
{"title":"Clinical Evaluation of a New Approach for IOL Power Calculation in Keratoconus","authors":"D. P. Llorens, Esteban Caravaca-Arens, Vicente J. Camps, R. Fikry, Verónica Mateo, Fady E. Labib, M. T. Caballero","doi":"10.5005/jp-journals-10025-1177","DOIUrl":"https://doi.org/10.5005/jp-journals-10025-1177","url":null,"abstract":"Purpose: To obtain an expression of the adjusted IOL power (PIOLadj) in keratoconus eyes associated with minimal errors in IOL power calculation. Materials and methods: This retrospective study included a total of 25 eyes of 25 patients with ages ranging from 20 years to 76 years. The following IOLs were implanted: Acrysof IQ Toric, Acrysof SA60AT in 9 eyes, Sensar in 3 eyes, Tecnis 1 in 4 eyes, and Tecnis Toric in 2 eyes. The PIOLadj is based on Gauss equations, using adjusted keratometric index (nkadj) specific to keratoconus eyes. From this nkadj, an adjusted keratometric corneal power is calculated (Pkadj). The PIOLadj calculation was performed after estimating the effective lens position (ELP) using a mathematical expression obtained by multiple regression analysis (named ELPadj). Comparison between the PIOLadj and the real intraocular power implanted in each patient (PIOLreal) was carried out. Results: No significant differences between PIOLreal and PIOLadj were found. However, differences could be clinically relevant up to of 2.54 D as PIOLreal increases. But, in the range of PIOLreal between 0 and 20 D, differences were lower than 1.5 D, being most of them below 1 D. Conclusion: A new formula of IOL power calculation (PIOLadj) based on the use of an adjusted keratometric power (Pkadj) that considers a variable keratometric index due to the influence of the posterior corneal surface (nkadj) and adjusted effective lens position (ELPadj) is useful for estimating IOL power in low-to-moderate keratoconus, with more limitation in the most advanced keratoconus.","PeriodicalId":92051,"journal":{"name":"International journal of keratoconus and ectatic corneal diseases","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48262416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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