دورية أكاديمية
أعرض في EDS

Personal A-constant in relation to axial length with various intraocular lenses.

التفاصيل البيبلوغرافية
العنوان: Personal A-constant in relation to axial length with various intraocular lenses.
المؤلفون: Eldaly MA; Department of Ophthalmology, Faculty of Medicine, Cairo University, Giza, Egypt., Mansour KA
المصدر: Indian journal of ophthalmology [Indian J Ophthalmol] 2014 Jul; Vol. 62 (7), pp. 788-91.
نوع المنشور: Comparative Study; Journal Article
اللغة: English
بيانات الدورية: Publisher: Medknow Publications Country of Publication: India NLM ID: 0405376 Publication Model: Print Cited Medium: Internet ISSN: 1998-3689 (Electronic) Linking ISSN: 03014738 NLM ISO Abbreviation: Indian J Ophthalmol Subsets: MEDLINE
أسماء مطبوعة: Publication: Mumbai : Medknow Publications
Original Publication: Bombay : All-India Ophthalmological Society
مواضيع طبية MeSH: Axial Length, Eye* , Lens Implantation, Intraocular*, Cataract/*diagnosis , Refraction, Ocular/*physiology , Visual Acuity/*physiology, Humans ; Phacoemulsification ; Prospective Studies
مستخلص: Purpose: To study the relationship between the axial length and personal A-constant for the 1-piece Tecnis (Abbott ZCB00), AcrySof MA60AC (Alcon) and the Quatrix aspheric preloaded (CROMA) intraocular lenses (IOL).
Materials and Methods: Patients matching the inclusion criteria were further subdivided according to the implanted IOL in this prospective comparative study. The obtained refractive outcomes were introduced into the formula installed in the biometry machine (Humphrey model 820 ultrasonic biometer) to obtain the personal A-constant for each eye. Polynomial regression analysis was done to study the individualized A-constant for each type of IOL in relation to preoperative axial length measurement.
Results: Two hundred and forty five eyes of 186 patients were enrolled into this study, of whom 73 eyes with Tecnis 1-piece, 116 eyes with MA60AC, and 56 eyes with Quatrix. The median of personalized A-constant for Tecnis 1-piece, MA60AC, and Quatrix were 119.21 (SD 1.3, Std. Mean error 0.15), 119 (SD 1.2, Std. Mean error 0.11) and 120.4 (SD 1.2, Std. Mean error 0.16) respectively. Regression plots for the same range of axial length among all the groups showed that the Tecnis1 group followed the same pattern of the Quatrix group in which there was a linear relationship of a trend towards myopia when the axial length had increased and a hyperopic shift when decreased. This relationship changed into a plateau when the axial length became in the range of 23.5 mm to 27 mm in the MA60AC group.
Conclusions: Personal A-constant follows different trends with different IOLs even for the same range of axial length.
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تواريخ الأحداث: Date Created: 20140814 Date Completed: 20161101 Latest Revision: 20211021
رمز التحديث: 20221213
مُعرف محوري في PubMed: PMC4152648
DOI: 10.4103/0301-4738.138300
PMID: 25116771
قاعدة البيانات: MEDLINE
الوصف
تدمد:1998-3689
DOI:10.4103/0301-4738.138300