New web-based algorithm to improve rigid gas permeable contact lens fitting in keratoconus.
Purpose: To calculate and validate a new web-based algorithm for selecting the back optic zone radius (BOZR) of spherical gas permeable (GP) lens in keratoconus eyes.Methods: A retrospective calculation (n=35; multiple regression analysis) and a posterior prospective validation (new sample of 50 ker...
| Publicado en: | Contact Lens & Anterior Eye Vol. 40; no. 3; pp. 143 - 151 |
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| Autores principales: | , , , |
| Formato: | Journal Article |
| Publicado: |
Elsevier B.V.
Jun2017
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=123574419&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 123574419 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 13670484 KJM jtl: Contact Lens & Anterior Eye issn: 13670484 maglogo: N pubinfo: dt: Jun2017 vid: 40 iid: 3 pid: 467 pub: Elsevier B.V. place: New York, New York artinfo: ui: 123574419 123574419 NLM28057440 10.1016/j.clae.2016.12.009 NLM28057440 123574419 ppf: 143 ppct: 8 formats: tig: atl: New web-based algorithm to improve rigid gas permeable contact lens fitting in keratoconus. aug: au: Ortiz-Toquero, Sara Rodriguez, Guadalupe de Juan, Victoria Martin, Raul affil: Universidad de Valladolid, Departamento de Física Teórica, Atómica y Óptica, Paseo de Belén, 7 − Campus Miguel Delibes, 47011 Valladolid, Spain sug: subj: Algorithms Internet Refraction, Ocular Corneal Diseases Rehabilitation Contact Lenses Adolescence Adult Retrospective Design Prospective Studies Corneal Diseases Diagnosis Equipment Design Cornea Pathology Middle Age Corneal Topography Young Adult Female Male Scales Adolescent: 13-18 years Adult: 19-44 years Middle Aged: 45-64 years Female Male ab: Purpose: To calculate and validate a new web-based algorithm for selecting the back optic zone radius (BOZR) of spherical gas permeable (GP) lens in keratoconus eyes.Methods: A retrospective calculation (n=35; multiple regression analysis) and a posterior prospective validation (new sample of 50 keratoconus eyes) of a new algorithm to select the BOZR of spherical KAKC design GP lenses (Conoptica) in keratoconus were conducted. BOZR calculated with the new algorithm, manufacturer guidelines and APEX software were compared with the BOZR that was finally prescribed. Number of diagnostic lenses, ordered lenses and visits to achieve optimal fitting were recorded and compared those obtained for a control group [50 healthy eyes fitted with spherical GP (BIAS design; Conoptica)].Results: The new algorithm highly correlated with the final BOZR fitted (r2=0.825, p<0.001). BOZR of the first diagnostic lens using the new algorithm demonstrated lower difference with the final BOZR prescribed (-0.01±0.12mm, p=0.65; 58% difference≤0.05mm) than with the manufacturer guidelines (+0.12±0.22mm, p<0.001; 26% difference≤0.05mm) and APEX software (-0.14±0.16mm, p=0.001; 34% difference≤0.05mm). Close numbers of diagnostic lens (1.6±0.8, 1.3±0.5; p=0.02), ordered lens (1.4±0.6, 1.1±0.3; P<0.001), and visits (3.4±0.7, 3.2±0.4; p=0.08) were required to fit keratoconus and healthy eyes, respectively.Conclusion: This new algorithm (free access at www.calculens.com) improves spherical KAKC GP fitting in keratoconus and can reduce the practitioner and patient chair time to achieve a final acceptable fit in keratoconus. This algorithm reduces differences between keratoconus GP fitting (KAKC design) and standard GP (BIAS design) lenses fitting in healthy eyes. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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