A study of relationship between the keratometric and refractive astigmatism in pseudophakia
Journal Title: MedPulse -International Medical Journal - Year 2015, Vol 2, Issue 10
Abstract
Introduction: The goal of current refractive cataract surgery is an excellent uncorrected visual acuity (UCVA) in all fixation ranges, which requires a zero postoperative refractive astigmatism (RA). This goal may be reached by implantation of toric lenses and by a variety of corneal procedures, such as on-axis phaco incisions, limbal relaxation incisions, anterior keratotomy and postoperative corneal laser touch-ups. Objective: To study relationship between the keratometric and refractive 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. All subjects underwent phacoemulsification with 3.2mm corneal incision superotemporal (53%) and infero-temporal (47%) approach with foldable intraocular lens implants. The patients were followed up for a period of 8wks. There was a statistically significant change in refractive astigmatism from pre-op state to post-op state. 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: Hence we conclude that, astigmatism in human eyes is caused by several factors other than cornea and lens.
Authors and Affiliations
Vijay B Shinde, Poonam Thakur
Keywords
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