Preoperative Prevalence of Magnitude and type of Anterior corneal Astigmatism in Cataract patients who underwent phacoemulsification in a Teaching Hospital in Kolkata, India - A Retrospective Observational study

• Ayan Mitra,*  
• PAYAL MANNA,  
• Chiranjib Sarkar

Abstract

Aim: To determine the Magnitude and type of preoperative astigmatism in cataract patients and to find any relationship with their demographic profiles , also to assess it’s implication on the training of Ophthalmic Post Graduate trainees. Material and Methods: It is a Retrospective observational study. Records of Patients who underwent Phacoemulsification in KPC Medical College from July 2021to June 2023 was screened for demographic profile, Keratometry and Astigmatism with its Axis. Patients who had any major Ocular Surface disorder or Corneal Pathology or lid tumors or who underwent other ocular surgery prior will not be included in this study. Name of the patients was not collected to maintain confidentiality and safeguard the interest of the patients. Data was collected on Microsoft Excel and was analyzed by SPSS software. Results: 536 eyes of 524 patients were studied after considering all the excluding criteria. Mean age of the patients was 65.14 with range of 37 to 92. There were 252 males and 282 females. The mean residual astigmatism was 0.83 Dioptre (D).31 patients had no astigmatism. 341 patients(63.62% ) have astigmatism less than 1D whereas 164 patients(30.6% ) had 1D or more astigmatism.ATR had the highest prevalence (44.95%) followed by ObliqueA (32.67%), WTR (22.97) CONCLUSION: Post graduate trainees in ophthalmology should be trained to perform Phacoemulsification from the temporal side as this would neutralise ATR which is the most common type of Astigmatism in Cataract patients. Also they should be exposed to Toric IOLs which is used to correct higher astigmatism >1Dioptre

Keywords

Astigmatism, keratomery , Against the rule Astigmatism(ATR), With the rule astigmatism(WTR), Oblique Astigmatism(OA)

Ahead of Print Date : 2024-05-31