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Published in: BMC Ophthalmology 1/2023

Open Access 01-12-2023 | Research

Keratoconus International Consortium (KIC)- advancing keratoconus research

Authors: Srujana Sahebjada, Elsie Chan, Gerard Sutton, Chi Pui Calvin Pang, Yves Kerdraon, Sundaram Natarajan, Wafaa Meteoukki, Andrea Ang, Mark Daniell, Paul N. Baird, Srujana Sahebjada for KIC Members

Published in: BMC Ophthalmology | Issue 1/2023

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Abstract

Clinical relevance

The Keratoconus International Consortium (KIC) will allow better understanding of keratoconus.

Background

Keratoconus is a disorder characterised by corneal elevation and thinning, leading to reduced vision. The current gaps in understanding of this disease will be discussed and the need for a multi-pronged and multi-centre engagement to enhance our understanding of keratoconus will be highlighted.

Design

KIC has been established to address the gaps in our understanding of keratoconus with the aim of collecting baseline as well as longitudinal data on several fields.

Participants

Keratoconus and control (no corneal condition) subjects from different sites globally will be recruited in the study.

Methods

KIC collects data using an online, secure database, which enables standardised data collection at member sites. Data fields collected include medical history, clinical features, quality of life and economic burden questionnaires and possible genetic sample collection from patients of different ethnicities across different geographical locations.

Results

There are currently 40 Australian and international clinics or hospital departments who have joined the KIC. Baseline data has so far been collected on 1130 keratoconus patients and indicates a median age of 29.70 years with 61% being male. A total of 15.3% report a positive family history of keratoconus and 57.7% self-report a history of frequent eye rubbing.

Conclusion

The strength of this consortium is its international, collaborative design and use of a common data collection tool. Inclusion and analyses of cross-sectional and longitudinal data will help answer many questions that remain in keratoconus, including factors affecting progression and treatment outcomes.
Literature
1.
go back to reference Gomes JA, Rapuano CJ, Belin MW, et al. Global consensus on keratoconus diagnosis. Cornea. 2015;34:e38-39.PubMedCrossRef Gomes JA, Rapuano CJ, Belin MW, et al. Global consensus on keratoconus diagnosis. Cornea. 2015;34:e38-39.PubMedCrossRef
2.
go back to reference Kanellopoulos AJ, Asimellis G. Revisiting keratoconus diagnosis and progression classification based on evaluation of corneal asymmetry indices, derived from Scheimpflug imaging in keratoconic and suspect cases. Clin Ophthalmol. 2013;7:1539–48.PubMedCrossRef Kanellopoulos AJ, Asimellis G. Revisiting keratoconus diagnosis and progression classification based on evaluation of corneal asymmetry indices, derived from Scheimpflug imaging in keratoconic and suspect cases. Clin Ophthalmol. 2013;7:1539–48.PubMedCrossRef
3.
go back to reference Li X, Yang H, Rabinowitz YS. Keratoconus: classification scheme based on videokeratography and clinical signs. J Cataract Refract Surg. 2009;35:1597–603.PubMedPubMedCentralCrossRef Li X, Yang H, Rabinowitz YS. Keratoconus: classification scheme based on videokeratography and clinical signs. J Cataract Refract Surg. 2009;35:1597–603.PubMedPubMedCentralCrossRef
4.
go back to reference McMahon TT, Szczotka-Flynn L, Barr JT, et al. A new method for grading the severity of keratoconus: the Keratoconus Severity Score (KSS). Cornea. 2006;25:794–800.PubMedCrossRef McMahon TT, Szczotka-Flynn L, Barr JT, et al. A new method for grading the severity of keratoconus: the Keratoconus Severity Score (KSS). Cornea. 2006;25:794–800.PubMedCrossRef
5.
go back to reference Rabinowitz YS, Rasheed K. KISA% index: a quantitative videokeratography algorithm embodying minimal topographic criteria for diagnosing keratoconus. J Cataract Refract Surg. 1999;25:1327–35.PubMedCrossRef Rabinowitz YS, Rasheed K. KISA% index: a quantitative videokeratography algorithm embodying minimal topographic criteria for diagnosing keratoconus. J Cataract Refract Surg. 1999;25:1327–35.PubMedCrossRef
7.
go back to reference Kennedy RH, Bourne WM, Dyer JA. A 48-year clinical and epidemiologic study of keratoconus. Am J Ophthalmol. 1986;101:267–73.PubMedCrossRef Kennedy RH, Bourne WM, Dyer JA. A 48-year clinical and epidemiologic study of keratoconus. Am J Ophthalmol. 1986;101:267–73.PubMedCrossRef
8.
go back to reference Godefrooij DA, de Wit GA, Uiterwaal CS, et al. Age-specific incidence and prevalence of keratoconus: a nationwide registration study. Am J Ophthalmol. 2017;175:169–72.PubMedCrossRef Godefrooij DA, de Wit GA, Uiterwaal CS, et al. Age-specific incidence and prevalence of keratoconus: a nationwide registration study. Am J Ophthalmol. 2017;175:169–72.PubMedCrossRef
9.
go back to reference Salman A, Darwish T, Ghabra M, et al. Prevalence of keratoconus in a population-based study in Syria. J Ophthalmol. 2022;23(2022):6064533. Salman A, Darwish T, Ghabra M, et al. Prevalence of keratoconus in a population-based study in Syria. J Ophthalmol. 2022;23(2022):6064533.
10.
go back to reference Hashemi H, Beiranvand A, Khabazkhoob M, et al. Prevalence of keratoconus in a population-based study in Shahroud. Cornea. 2013;32:1441–5.PubMedCrossRef Hashemi H, Beiranvand A, Khabazkhoob M, et al. Prevalence of keratoconus in a population-based study in Shahroud. Cornea. 2013;32:1441–5.PubMedCrossRef
11.
go back to reference Woodward MA, Blachley TS, Stein JD. The association between sociodemographic factors, common systemic diseases, and keratoconus: an analysis of a nationwide heath care claims database. Ophthalmology. 2016;123(457–465): e2. Woodward MA, Blachley TS, Stein JD. The association between sociodemographic factors, common systemic diseases, and keratoconus: an analysis of a nationwide heath care claims database. Ophthalmology. 2016;123(457–465): e2.
12.
go back to reference Patel D, McGhee C. Understanding keratoconus: what have we learned from the New Zealand perspective? Clin Exp Optom. 2013;96:183–7.PubMedCrossRef Patel D, McGhee C. Understanding keratoconus: what have we learned from the New Zealand perspective? Clin Exp Optom. 2013;96:183–7.PubMedCrossRef
13.
go back to reference Pearson AR, Soneji B, Sarvananthan N, Sandford-Smith JH. Does ethnic origin influence the incidence or severity of keratoconus? Eye (Lond). 2000;14:625–8.PubMedCrossRef Pearson AR, Soneji B, Sarvananthan N, Sandford-Smith JH. Does ethnic origin influence the incidence or severity of keratoconus? Eye (Lond). 2000;14:625–8.PubMedCrossRef
14.
go back to reference Georgiou T, Funnell CL, Cassels-Brown A, O’Conor R. Influence of ethnic origin on the incidence of keratoconus and associated atopic disease in Asians and white patients. Eye (Lond). 2004;18:379–83.PubMedCrossRef Georgiou T, Funnell CL, Cassels-Brown A, O’Conor R. Influence of ethnic origin on the incidence of keratoconus and associated atopic disease in Asians and white patients. Eye (Lond). 2004;18:379–83.PubMedCrossRef
15.
16.
go back to reference Cao K, Sahebjada S, Richardson AJ, Baird PN. Do age-related macular degeneration genes show association with keratoconus? Eye Vis (Lond). 2019;6:38.PubMedCrossRef Cao K, Sahebjada S, Richardson AJ, Baird PN. Do age-related macular degeneration genes show association with keratoconus? Eye Vis (Lond). 2019;6:38.PubMedCrossRef
17.
go back to reference Khong JJ, Burdon KP, Lu Y, et al. Pooled genome wide association detects association upstream of FCRL3 with Graves’ disease. BMC Genomics. 2016;17:939.PubMedPubMedCentralCrossRef Khong JJ, Burdon KP, Lu Y, et al. Pooled genome wide association detects association upstream of FCRL3 with Graves’ disease. BMC Genomics. 2016;17:939.PubMedPubMedCentralCrossRef
18.
go back to reference McComish BJ, Sahebjada S, Bykhovskaya Y, et al. Association of Genetic Variation with Keratoconus. JAMA Ophthalmol. 2020;138:174–81.PubMedCrossRef McComish BJ, Sahebjada S, Bykhovskaya Y, et al. Association of Genetic Variation with Keratoconus. JAMA Ophthalmol. 2020;138:174–81.PubMedCrossRef
19.
go back to reference Sahebjada S, Schache M, Richardson AJ, et al. Association of the hepatocyte growth factor gene with keratoconus in an Australian population. PLoS ONE. 2014;9(1): e84067.PubMedPubMedCentralCrossRef Sahebjada S, Schache M, Richardson AJ, et al. Association of the hepatocyte growth factor gene with keratoconus in an Australian population. PLoS ONE. 2014;9(1): e84067.PubMedPubMedCentralCrossRef
20.
go back to reference Sahebjada S, Schache M, Richardson AJ, et al. Evaluating the association between keratoconus and the corneal thickness genes in an independent Australian population. Invest Ophthalmol Vis Sci. 2013;54:8224–8.PubMedCrossRef Sahebjada S, Schache M, Richardson AJ, et al. Evaluating the association between keratoconus and the corneal thickness genes in an independent Australian population. Invest Ophthalmol Vis Sci. 2013;54:8224–8.PubMedCrossRef
21.
22.
23.
go back to reference Tang YG, Rabinowitz YS, Taylor KD, et al. Genomewide linkage scan in a multigeneration Caucasian pedigree identifies a novel locus for keratoconus on chromosome 5q14.3-q21.1. Genet Med. 2005;7:397–405.PubMedCrossRef Tang YG, Rabinowitz YS, Taylor KD, et al. Genomewide linkage scan in a multigeneration Caucasian pedigree identifies a novel locus for keratoconus on chromosome 5q14.3-q21.1. Genet Med. 2005;7:397–405.PubMedCrossRef
24.
go back to reference Gajecka M, Radhakrishna U, Winters D, et al. Localization of a gene for keratoconus to a 5.6-Mb interval on 13q32. Invest Ophthalmol Vis Sci. 2009;50:1531–9.PubMedCrossRef Gajecka M, Radhakrishna U, Winters D, et al. Localization of a gene for keratoconus to a 5.6-Mb interval on 13q32. Invest Ophthalmol Vis Sci. 2009;50:1531–9.PubMedCrossRef
25.
go back to reference McGhee CN. 2008 Sir Norman McAlister Gregg Lecture: 150 years of practical observations on the conical cornea–what have we learned? Clin Exp Ophthalmol. 2009;37:160–76.PubMedCrossRef McGhee CN. 2008 Sir Norman McAlister Gregg Lecture: 150 years of practical observations on the conical cornea–what have we learned? Clin Exp Ophthalmol. 2009;37:160–76.PubMedCrossRef
26.
go back to reference McMonnies CW. Mechanisms of rubbing-related corneal trauma in keratoconus. Cornea. 2009;28:607–15.PubMedCrossRef McMonnies CW. Mechanisms of rubbing-related corneal trauma in keratoconus. Cornea. 2009;28:607–15.PubMedCrossRef
27.
go back to reference Shetty R, Ghosh A, Lim RR, et al. Elevated expression of matrix metalloproteinase-9 and inflammatory cytokines in keratoconus patients is inhibited by cyclosporine A. Invest Ophthalmol Vis Sci. 2015;56:738–50.PubMedCrossRef Shetty R, Ghosh A, Lim RR, et al. Elevated expression of matrix metalloproteinase-9 and inflammatory cytokines in keratoconus patients is inhibited by cyclosporine A. Invest Ophthalmol Vis Sci. 2015;56:738–50.PubMedCrossRef
28.
go back to reference Chan E, Snibson GR. Current status of corneal collagen cross-linking for keratoconus: a review. Clin Exp Optom. 2013;96:155–64.PubMedCrossRef Chan E, Snibson GR. Current status of corneal collagen cross-linking for keratoconus: a review. Clin Exp Optom. 2013;96:155–64.PubMedCrossRef
29.
go back to reference Tuft SJ, Moodaley LC, Gregory WM, et al. Prognostic factors for the progression of keratoconus. Ophthalmology. 1994;101:439–47.PubMedCrossRef Tuft SJ, Moodaley LC, Gregory WM, et al. Prognostic factors for the progression of keratoconus. Ophthalmology. 1994;101:439–47.PubMedCrossRef
30.
go back to reference Kankariya VP, Kymionis GD, Diakonis VF, Yoo SH. Management of pediatric keratoconus - evolving role of corneal collagen cross-linking: an update. Indian J Ophthalmol. 2013;61:435–40.PubMedPubMedCentralCrossRef Kankariya VP, Kymionis GD, Diakonis VF, Yoo SH. Management of pediatric keratoconus - evolving role of corneal collagen cross-linking: an update. Indian J Ophthalmol. 2013;61:435–40.PubMedPubMedCentralCrossRef
31.
go back to reference Mukhtar S, Ambati BK. Pediatric keratoconus: a review of the literature. Int Ophthalmol. 2018;38:2257–66.PubMedCrossRef Mukhtar S, Ambati BK. Pediatric keratoconus: a review of the literature. Int Ophthalmol. 2018;38:2257–66.PubMedCrossRef
32.
go back to reference Ferdi AC, Nguyen V, Gore DM, et al. Keratoconus natural progression: a systematic review and meta-analysis of 11,529 eyes. Ophthalmology. 2019;126:935–45.PubMedCrossRef Ferdi AC, Nguyen V, Gore DM, et al. Keratoconus natural progression: a systematic review and meta-analysis of 11,529 eyes. Ophthalmology. 2019;126:935–45.PubMedCrossRef
33.
go back to reference Chan E, Baird PN, Vogrin S, et al. Economic impact of keratoconus using a health expenditure questionnaire: a patient perspective. Clin Exp Ophthalmol. 2020;48:287–300.PubMedCrossRef Chan E, Baird PN, Vogrin S, et al. Economic impact of keratoconus using a health expenditure questionnaire: a patient perspective. Clin Exp Ophthalmol. 2020;48:287–300.PubMedCrossRef
34.
go back to reference Hardcastle AJ, Liskova P, Bykhovskaya Y, et al. A multi-ethnic genome-wide association study implicates collagen matrix integrity and cell differentiation pathways in keratoconus. Commun Biol. 2021;4(1):266.PubMedPubMedCentralCrossRef Hardcastle AJ, Liskova P, Bykhovskaya Y, et al. A multi-ethnic genome-wide association study implicates collagen matrix integrity and cell differentiation pathways in keratoconus. Commun Biol. 2021;4(1):266.PubMedPubMedCentralCrossRef
35.
go back to reference Sahebjada S, Chan E, Vogrin S, et al. Economic impact of Keratoconus -a patient's perspective. Invest Ophth Vis Sci. 2018;59(9). Sahebjada S, Chan E, Vogrin S, et al. Economic impact of Keratoconus -a patient's perspective. Invest Ophth Vis Sci. 2018;59(9).
36.
go back to reference Sahebjada S, Chan E, Xie J, et al. Risk factors and association with severity of keratoconus: the Australian study of Keratoconus. Int Ophthalmol. 2021;41(3):891–9.PubMedCrossRef Sahebjada S, Chan E, Xie J, et al. Risk factors and association with severity of keratoconus: the Australian study of Keratoconus. Int Ophthalmol. 2021;41(3):891–9.PubMedCrossRef
37.
go back to reference Sahebjada S, Fenwick EK, Xie J, et al. Impact of keratoconus in the better eye and the worse eye on vision-related quality of life. Invest Ophthalmol Vis Sci. 2014;55(1):412–6.PubMedCrossRef Sahebjada S, Fenwick EK, Xie J, et al. Impact of keratoconus in the better eye and the worse eye on vision-related quality of life. Invest Ophthalmol Vis Sci. 2014;55(1):412–6.PubMedCrossRef
38.
go back to reference Sahebjada S, Schache M, Richardson AJ, et al. Association of the hepatocyte growth factor gene with keratoconus in an Australian population. PLoS ONE. 2014;9(1): e84067.PubMedPubMedCentralCrossRef Sahebjada S, Schache M, Richardson AJ, et al. Association of the hepatocyte growth factor gene with keratoconus in an Australian population. PLoS ONE. 2014;9(1): e84067.PubMedPubMedCentralCrossRef
39.
go back to reference Sahebjada S, Xie J, Chan E, et al. Assessment of anterior segment parameters of keratoconus eyes in an Australian population. Optom Vis Sci. 2014;91(7):803–9.PubMedCrossRef Sahebjada S, Xie J, Chan E, et al. Assessment of anterior segment parameters of keratoconus eyes in an Australian population. Optom Vis Sci. 2014;91(7):803–9.PubMedCrossRef
41.
go back to reference Lamoureux EL, Pallant JF, Pesudovs K, et al. The impact of vision impairment questionnaire: an evaluation of its measurement properties using Rasch analysis. Invest Ophth Vis Sci. 2006;47:4732–41.CrossRef Lamoureux EL, Pallant JF, Pesudovs K, et al. The impact of vision impairment questionnaire: an evaluation of its measurement properties using Rasch analysis. Invest Ophth Vis Sci. 2006;47:4732–41.CrossRef
42.
go back to reference Cochrane G, Lamoureux E, Keeffe J. Defining the content for a new quality of life questionnaire for students with low vision (the Impact of Vision Impairment on Children: IVI_C). Ophthalmic Epidemiol. 2008;15:114–20.PubMedCrossRef Cochrane G, Lamoureux E, Keeffe J. Defining the content for a new quality of life questionnaire for students with low vision (the Impact of Vision Impairment on Children: IVI_C). Ophthalmic Epidemiol. 2008;15:114–20.PubMedCrossRef
43.
go back to reference Harris PA, Taylor R, Thielke R, et al. Research electronic data capture (REDCap)–a metadata-driven methodology and workflow process for providing translational research informatics support. J Biomed Inform. 2009;42:377–81.PubMedCrossRef Harris PA, Taylor R, Thielke R, et al. Research electronic data capture (REDCap)–a metadata-driven methodology and workflow process for providing translational research informatics support. J Biomed Inform. 2009;42:377–81.PubMedCrossRef
44.
go back to reference Sahebjada S, Al-Mahrouqi HH, Moshegov S, et al. Eye rubbing in the aetiology of keratoconus: a systematic review and meta-analysis. Graefes Arch Clin Exp Ophthalmol. 2021;259:2057–67.PubMedCrossRef Sahebjada S, Al-Mahrouqi HH, Moshegov S, et al. Eye rubbing in the aetiology of keratoconus: a systematic review and meta-analysis. Graefes Arch Clin Exp Ophthalmol. 2021;259:2057–67.PubMedCrossRef
45.
go back to reference Crawford AZ, Zhang J, Gokul A, et al. The Enigma of Environmental Factors in Keratoconus. Asia Pac J Ophthalmol (Phila). 2020;9:549–56.PubMedCrossRef Crawford AZ, Zhang J, Gokul A, et al. The Enigma of Environmental Factors in Keratoconus. Asia Pac J Ophthalmol (Phila). 2020;9:549–56.PubMedCrossRef
46.
go back to reference Zadnik K, Barr JT, Edrington TB, et al. Baseline findings in the Collaborative Longitudinal Evaluation of Keratoconus (CLEK) Study. Invest Ophthalmol Vis Sci. 1998;39:2537–46.PubMed Zadnik K, Barr JT, Edrington TB, et al. Baseline findings in the Collaborative Longitudinal Evaluation of Keratoconus (CLEK) Study. Invest Ophthalmol Vis Sci. 1998;39:2537–46.PubMed
47.
go back to reference Zadnik K, Barr JT, Gordon MO, Edrington TB. Biomicroscopic signs and disease severity in keratoconus. Collaborative Longitudinal Evaluation of Keratoconus (CLEK) Study Group. Cornea. 1996;15:139–46.PubMedCrossRef Zadnik K, Barr JT, Gordon MO, Edrington TB. Biomicroscopic signs and disease severity in keratoconus. Collaborative Longitudinal Evaluation of Keratoconus (CLEK) Study Group. Cornea. 1996;15:139–46.PubMedCrossRef
48.
go back to reference Edrington TB, Barr JT, Zadnik K, et al. Standardized rigid contact lens fitting protocol for keratoconus. Optom Vis Sci. 1996;73:369–75.PubMedCrossRef Edrington TB, Barr JT, Zadnik K, et al. Standardized rigid contact lens fitting protocol for keratoconus. Optom Vis Sci. 1996;73:369–75.PubMedCrossRef
49.
go back to reference Edrington TB, Szczotka LB, Begley CG, et al. Repeatability and agreement of two corneal-curvature assessments in keratoconus: keratometry and the first definite apical clearance lens (FDACL). CLEK Study Group. Collaborative Longitudinal Evaluation of Keratoconus. Cornea. 1998;17:267–77.PubMedCrossRef Edrington TB, Szczotka LB, Begley CG, et al. Repeatability and agreement of two corneal-curvature assessments in keratoconus: keratometry and the first definite apical clearance lens (FDACL). CLEK Study Group. Collaborative Longitudinal Evaluation of Keratoconus. Cornea. 1998;17:267–77.PubMedCrossRef
50.
go back to reference Edrington TB, Szczotka LB, Barr JT, et al. Rigid contact lens fitting relationships in keratoconus. Collaborative Longitudinal Evaluation of Keratoconus (CLEK) Study Group. Optom Vis Sci. 1999;76:692–9.PubMedCrossRef Edrington TB, Szczotka LB, Barr JT, et al. Rigid contact lens fitting relationships in keratoconus. Collaborative Longitudinal Evaluation of Keratoconus (CLEK) Study Group. Optom Vis Sci. 1999;76:692–9.PubMedCrossRef
51.
go back to reference Edrington TB, Gundel RE, Libassi DP, et al. Variables affecting rigid contact lens comfort in the collaborative longitudinal evaluation of keratoconus (CLEK) study. Optom Vis Sci. 2004;81:182–8.PubMedCrossRef Edrington TB, Gundel RE, Libassi DP, et al. Variables affecting rigid contact lens comfort in the collaborative longitudinal evaluation of keratoconus (CLEK) study. Optom Vis Sci. 2004;81:182–8.PubMedCrossRef
52.
go back to reference Fink BA, Barr JT, Edrington TB, et al. A comparison of two methods of evaluating cornea-to-contact lens base curve fluorescein patterns in keratoconus. Optom Vis Sci. 2001;78:589–98.PubMedCrossRef Fink BA, Barr JT, Edrington TB, et al. A comparison of two methods of evaluating cornea-to-contact lens base curve fluorescein patterns in keratoconus. Optom Vis Sci. 2001;78:589–98.PubMedCrossRef
53.
go back to reference Weed KH, Macewen CJ, McGhee CN. The Dundee University Scottish Keratoconus Study II: a prospective study of optical and surgical correction. Ophthalmic Physiol Opt. 2007;27:561–7.PubMedCrossRef Weed KH, Macewen CJ, McGhee CN. The Dundee University Scottish Keratoconus Study II: a prospective study of optical and surgical correction. Ophthalmic Physiol Opt. 2007;27:561–7.PubMedCrossRef
54.
go back to reference Weed KH, MacEwen CJ, Giles T, et al. The Dundee University Scottish Keratoconus study: demographics, corneal signs, associated diseases, and eye rubbing. Eye (Lond). 2008;22:534–41.PubMedCrossRef Weed KH, MacEwen CJ, Giles T, et al. The Dundee University Scottish Keratoconus study: demographics, corneal signs, associated diseases, and eye rubbing. Eye (Lond). 2008;22:534–41.PubMedCrossRef
56.
go back to reference Krumeich JH. Daniel J [Live epikeratophakia and deep lamellar keratoplasty for I-III stage-specific surgical treatment of keratoconus]. Klin Monbl Augenheilkd. 1997;211:94–100.PubMedCrossRef Krumeich JH. Daniel J [Live epikeratophakia and deep lamellar keratoplasty for I-III stage-specific surgical treatment of keratoconus]. Klin Monbl Augenheilkd. 1997;211:94–100.PubMedCrossRef
57.
go back to reference Naufal SC, Hess JS, Friedlander MH, Granet NS. Rasterstereography-based classification of normal corneas. J Cataract Refract Surg. 1997;23:222–30.PubMedCrossRef Naufal SC, Hess JS, Friedlander MH, Granet NS. Rasterstereography-based classification of normal corneas. J Cataract Refract Surg. 1997;23:222–30.PubMedCrossRef
58.
go back to reference Alio JL, Shabayek MH. Corneal higher order aberrations: a method to grade keratoconus. J Refract Surg. 2006;22:539–45.PubMedCrossRef Alio JL, Shabayek MH. Corneal higher order aberrations: a method to grade keratoconus. J Refract Surg. 2006;22:539–45.PubMedCrossRef
59.
go back to reference Belin MW, Duncan JK. Keratoconus: The ABCD Grading System. Klin Monbl Augenheilkd. 2016;233:701–7.PubMedCrossRef Belin MW, Duncan JK. Keratoconus: The ABCD Grading System. Klin Monbl Augenheilkd. 2016;233:701–7.PubMedCrossRef
60.
go back to reference Alio JL, Pinero DP, Aleson A, et al. Keratoconus-integrated characterization considering anterior corneal aberrations, internal astigmatism, and corneal biomechanics. J Cataract Refract Surg. 2011;37:552–68.PubMedCrossRef Alio JL, Pinero DP, Aleson A, et al. Keratoconus-integrated characterization considering anterior corneal aberrations, internal astigmatism, and corneal biomechanics. J Cataract Refract Surg. 2011;37:552–68.PubMedCrossRef
61.
go back to reference Ramos-Lopez D, Martinez-Finkelshtein A, Castro-Luna GM, et al. Screening subclinical keratoconus with placido-based corneal indices. Optom Vis Sci. 2013;90:335–43.PubMedCrossRef Ramos-Lopez D, Martinez-Finkelshtein A, Castro-Luna GM, et al. Screening subclinical keratoconus with placido-based corneal indices. Optom Vis Sci. 2013;90:335–43.PubMedCrossRef
62.
go back to reference Viswanathan D, Kumar NL, Males JJ, Graham SL. Relationship of structural characteristics to biomechanical profile in normal, keratoconic, and crosslinked eyes. Cornea. 2015;34:791–6.PubMedCrossRef Viswanathan D, Kumar NL, Males JJ, Graham SL. Relationship of structural characteristics to biomechanical profile in normal, keratoconic, and crosslinked eyes. Cornea. 2015;34:791–6.PubMedCrossRef
63.
go back to reference Pena-Garcia P, Peris-Martinez C, Abbouda A, Ruiz-Moreno JM. Detection of subclinical keratoconus through non-contact tonometry and the use of discriminant biomechanical functions. J Biomech. 2016;49:353–63.PubMedCrossRef Pena-Garcia P, Peris-Martinez C, Abbouda A, Ruiz-Moreno JM. Detection of subclinical keratoconus through non-contact tonometry and the use of discriminant biomechanical functions. J Biomech. 2016;49:353–63.PubMedCrossRef
64.
go back to reference Wang LK, Tian L, Zheng YP. Determining in vivo elasticity and viscosity with dynamic Scheimpflug imaging analysis in keratoconic and healthy eyes. J Biophotonics. 2016;9:454–63.PubMedCrossRef Wang LK, Tian L, Zheng YP. Determining in vivo elasticity and viscosity with dynamic Scheimpflug imaging analysis in keratoconic and healthy eyes. J Biophotonics. 2016;9:454–63.PubMedCrossRef
65.
go back to reference Reinstein DZ, Archer TJ, Urs R, et al. Detection of keratoconus in clinically and algorithmically topographically normal fellow eyes using epithelial thickness analysis. J Refract Surg. 2015;31:736–44.PubMedPubMedCentralCrossRef Reinstein DZ, Archer TJ, Urs R, et al. Detection of keratoconus in clinically and algorithmically topographically normal fellow eyes using epithelial thickness analysis. J Refract Surg. 2015;31:736–44.PubMedPubMedCentralCrossRef
66.
go back to reference Temstet C, Sandali O, Bouheraoua N, et al. Corneal epithelial thickness mapping using Fourier-domain optical coherence tomography for detection of form fruste keratoconus. J Cataract Refract Surg. 2015;41:812–20.PubMedCrossRef Temstet C, Sandali O, Bouheraoua N, et al. Corneal epithelial thickness mapping using Fourier-domain optical coherence tomography for detection of form fruste keratoconus. J Cataract Refract Surg. 2015;41:812–20.PubMedCrossRef
67.
go back to reference Saad A, Gatinel D. Topographic and tomographic properties of forme fruste keratoconus corneas. Invest Ophthalmol Vis Sci. 2010;51:5546–55.PubMedCrossRef Saad A, Gatinel D. Topographic and tomographic properties of forme fruste keratoconus corneas. Invest Ophthalmol Vis Sci. 2010;51:5546–55.PubMedCrossRef
68.
go back to reference Belin MW, Asota IM, Ambrosio R Jr, Khachikian SS. What’s in a name: keratoconus, pellucid marginal degeneration, and related thinning disorders. Am J Ophthalmol. 2011;15:157–62.CrossRef Belin MW, Asota IM, Ambrosio R Jr, Khachikian SS. What’s in a name: keratoconus, pellucid marginal degeneration, and related thinning disorders. Am J Ophthalmol. 2011;15:157–62.CrossRef
69.
go back to reference Rowe F, Wormald R, Cable R, et al. The Sight Loss and Vision Priority Setting Partnership (SLV-PSP): overview and results of the research prioritisation survey process. BMJ Open. 2014;4: e004905.PubMedPubMedCentralCrossRef Rowe F, Wormald R, Cable R, et al. The Sight Loss and Vision Priority Setting Partnership (SLV-PSP): overview and results of the research prioritisation survey process. BMJ Open. 2014;4: e004905.PubMedPubMedCentralCrossRef
Metadata
Title
Keratoconus International Consortium (KIC)- advancing keratoconus research
Authors
Srujana Sahebjada
Elsie Chan
Gerard Sutton
Chi Pui Calvin Pang
Yves Kerdraon
Sundaram Natarajan
Wafaa Meteoukki
Andrea Ang
Mark Daniell
Paul N. Baird
Srujana Sahebjada for KIC Members
Publication date
01-12-2023
Publisher
BioMed Central
Published in
BMC Ophthalmology / Issue 1/2023
Electronic ISSN: 1471-2415
DOI
https://doi.org/10.1186/s12886-023-03087-w

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