A comparative study of pre and post operative astigmatism in pseudophakia
Journal Title: MedPulse -International Medical Journal - Year 2015, Vol 2, Issue 10
Abstract
Introduction: Now- a- days, cataract surgery is regarded as a refractive surgery, aiming pseudophakic emmetropia, which makes eliminating corneal astigmatism critical. All surgeons aim to eliminate any small ametropia, especially astigmatism, existing before or after cataract surgery. Objective: To compare pre operative and post operative astigmatism in pseudophakia. Materials and Method: The present study was conducted in the Mohan Eye Institute, New Delhi. The duration of study was from 1st December 2011 to 30th May 2012. Following inclusion and exclusion criteria was used to select the study patients. All patients, irrespective of age or sex who underwent a phacoemulsification surgery with a posterior chamber foldable intraocular lens implant for immature senile cataract in the study institute during the given duration. Incision size in all the patients was maintained at 3.2 mm with a keratome and it was a clear corneal incision. Results: Out of 91 patients, 58.24% were males and 41.76% were females. The mean age of the study patients was 64±8yrs. There was a statistically significant change in total astigmatism and no significant change in keratometric astigmatism pre-op state to post-op state. The mean pre-op value of keratometric astigmatism was -0.77 D (±0.35 D) and the post-op value was -0.75 D (±0.62 D). In pre-op patients total refractive astigmatism was about -1.39 D (±0.53 D) whereas it reduced to -0.95 D (±0.73 D). Conclusion: Thus we conclude that, it is impossible to predict postoperative refractive astigmatism using the preoperative keratometric astigmatism and incision location and size because other factors affect postoperative subjective refractive astigmatism.
Authors and Affiliations
Vijay B Shinde, Poonam Thakur
Keywords
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