The Topographical Effect of Optical Zone Diameter in Orthokeratology Contact Lenses in High Myopes
المؤلفون المشاركون
Batres, Laura
Carracedo, Gonzalo
Espinosa-Vidal, T. M.
Martínez-Alberquilla, I.
المصدر
العدد
المجلد 2019، العدد 2019 (31 ديسمبر/كانون الأول 2019)، ص ص. 1-10، 10ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2019-01-02
دولة النشر
مصر
عدد الصفحات
10
التخصصات الرئيسية
الملخص EN
Purpose.
To evaluate the effect of the optical zone diameter (OZ) in orthokeratology contact lenses regarding the topographical profile in patients with high myopia (−4.00 D to −7.00 D) and to study its effect over the visual quality.
Materials and Methods.
Twelve patients (18 eyes) were fitted with overnight orthokeratology (OrthoK) with a randomized 6 mm or 5 mm OZ lens worn for 2 weeks, followed by a 2-week washout period, between both designs.
Keratometry (K) readings, optical zone treatment diameter (OZT), peripheral ring width (PRW), higher-order aberrations (HOA), high (HC) and low contrast (LC) visual acuity, and subjective vision and comfort were measured at baseline and after 2 weeks of OrthoK lens wear of each contact lens.
Results.
No significant differences were found between any measurements for the same subject at both baselines (p value > 0.05).
There was no difference between OZ lens designs found in refraction, subjective vision or comfort, and HC and LC visual acuity.
Contrast sensitivity was decreased in the 5 mm OZ lens design compared with 6 mm OZ design (p-value < 0.05).
5 mm OZ design provoked a greater flattening, more powerful midperipheral ring and 4th-order corneal and total spherical aberration than the 6 mm OZ design, being statistically significant after 7 days, for corneal aberration, and 15 days, for corneal and total, of wearing the lens (p-value < 0.05).
The OZT obtained were 2.8 ± 0.2 mm and 3.1 ± 0.1 mm for 5 mm and 6 mm OZ design, respectively (p-value < 0.05).
Regarding PRW, the 5 mm OZ design had a wider ring width in both the nasal and temporal zones (p-value < 0.05).
Conclusions.
A smaller diameter optical zone (5 mm) in orthokeratology lenses produces a smaller treatment area and a larger and more powerful midperipheral ring, increasing the 4th-order spherical aberration that affects only the contrast sensitivity but without differences in visual acuity and subjective vision compared with a larger OZ diameter (6 mm).
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Carracedo, Gonzalo& Espinosa-Vidal, T. M.& Martínez-Alberquilla, I.& Batres, Laura. 2019. The Topographical Effect of Optical Zone Diameter in Orthokeratology Contact Lenses in High Myopes. Journal of Ophthalmology،Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1185073
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Carracedo, Gonzalo…[et al.]. The Topographical Effect of Optical Zone Diameter in Orthokeratology Contact Lenses in High Myopes. Journal of Ophthalmology No. 2019 (2019), pp.1-10.
https://search.emarefa.net/detail/BIM-1185073
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Carracedo, Gonzalo& Espinosa-Vidal, T. M.& Martínez-Alberquilla, I.& Batres, Laura. The Topographical Effect of Optical Zone Diameter in Orthokeratology Contact Lenses in High Myopes. Journal of Ophthalmology. 2019. Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1185073
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1185073
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر