Sir Harold Ridley and the intraocular foreign body that made history

Kerala Journal of Ophthalmology

article

John, C. Biju¹ 

[1] Department Of Ophthalmology, Regional Institute of Ophthalmology, Government Medical College

关键词: Cataract surgery;    corneal astigmatism;    IOLMaster 700;   

DOI  :  10.4103/kjo.kjo_62_20

学科分类：社会科学、人文和艺术（综合）

来源: Wolters Kluwer Medknow Publications

【 摘 要 】

Context:  Preoperative corneal astigmatism plays a pivotal role in deciding the outcome of cataract surgery. If the values of biometry prevalent in a particular region are known, it will help the cataract surgeons locally even in the remote areas to optimize the postoperative visual outcome. Aims:  The aim was to study the prevalence and distribution of different types of corneal astigmatism among the patients in Malwa region of Punjab and its variations according to age. Settings and Design:  This was a hospital-based retrospective study conducted on 370 patients of Malwa who underwent cataract surgery between December 1, 2017, and July 31, 2018, in a medical college situated in North India. Subjects and Methods:  The records of the patients were reviewed, and biometric data – K1 and K2 – measured by IOLMaster™ 700 (Carl Zeiss Meditec AG, Jena, Germany) were collected. The data were categorized based on demographic variables, type of astigmatism, and extent of astigmatism. Statistical Analysis:  The data were subjected to descriptive statistical analysis to yield frequencies, percentages, and means. Results:  A total of 370 eyes of 370 patients were studied. The mean age of the studied population was 60.43 ± 9.9 years. Nearly 50.54% were males and the rest were females. The mean of K, K1, and K2 was 44.23 ± 1.65 D, 43.75 ± 1.68 D, and 44.71 ± 1.74 D, respectively. Almost 82.16% of the studied population had mean corneal astigmatism <1.5 D. The corneal astigmatism was against the rule (ATR) in 52.16%, with the rule (WTR) in 27.29%, and oblique in 17.83%. With increasing age, there is a gradual shift of astigmatism from WTR to ATR, in both males and females, which peaks in the sixth decade of life. Conclusions:  Majority of patients in Malwa region of Punjab have corneal astigmatism less than 1.5 D. Against-the-rule astigmatism is more common than other types of astigmatism.

【 授权许可】

CC BY-NC-SA