A Comparative Study on the Superior, Supero-Temporal and the Temporal Incisions in Small Incision Cataract Surgeries for Post Operative Astigmatism 1229-1232
Dr. Vaishali Satyajeet Pawar,
Senior Resident, Department of Ophthalmology,
Krishna Institute of Medical Sciences ,Karad,
Maharashtra, 415110, India.
Introduction: Cataract surgery is no more a blind rehabilitation surgery. With all the possible modalities of cataract surgery, we try to give a normal vision. But Surgically Induced Astigmatism (SIA) is one of the causes of a poor quality of vision. We have studied SIA in 3 different sites of incision in Manual Small Incision Cataract Surgery (SICS).
Purpose: To compare the amount of surgically induced astigmatism after the superior, supero-temporal and the temporal incisions in manual small incision cataract surgery.
Materials and Methods: Three hundred patients were studied. The patients were randomly assigned to any of three groups. The three groups had 100 patients each. The patients in group A underwent manual SICS with a superior incision, the patients in group B underwent manual SICS with a supero-temporal incision and the patients in group C underwent manual SICS with a temporal incision. The patients were examined on the postoperative days 1,7,21 and 45. The uncorrected and the best-corrected visual acuity was recorded and a slit-lamp examination and auto-refracto-meter and keratometry examinations were also done.
Statistics: All the calculations were performed by using the Surgically-Induced Astigmatism (SIA) calculator version 2.1, a free software program. The one way ANOVA test was also applied.
Results: The mean SIA in group A was found to be 1.572 Â± 0.651, in group B, it was 0.532Â± 0.317and in group C, it was 0.435 Â±0.338 .The F score which was applied was found to be 186.44. This value was more than the standard value. The p-value accordingly was < 0.001, which was highly significant.
Conclusion: SICS which is done with a temporal and a supero-temporal approach provides a better quality of vision due to a significantly less SIA than the superior approach.