Details
Category: Volume 08 Issue 04 April 2020
Hits: 1020

Title: A Comparative Study of Surgically induced astigmatism in superior versus Supero-Temporal scleral incision in Small Incision Cataract Surgery in a tertiary eye care center in state of Odisha

Authors: Dr Suresh Chandra Swain, MS, Dr Jayaram Meher, MBBS, Prof. P.K. Nanda, MS

 DOI: https://dx.doi.org/10.18535/jmscr/v8i4.56

Abstract

   

Aim: To evaluate & compare the surgically induced astigmatism (SIA) in superior & supero-temporal scleral incision in small incision cataract surgery.

Methods: This is a prospective comparative study done on a total number of 400 patients with senile cataract. 200 cases were randomly assigned superior scleral group & other 200 cases were allotted to supero-temporal scleral incision. Small incision cataract surgery with posterior chamber intraocular lens implantation were performed. Patients were examined post operatively 1stday, 1stweeks, 6th weeks & 12 weeks. Postoperative best-corrected visual acuity & astigmatism measured.

Results: The mean surgically induced astigmatism (SIA) in superior scleral incision is 1.35± 0.44, in super temporal group is 0.95± 0.44. In superior group mostly “against the rule astigmatism” & in supero-temporal group it is “with the rule astigmatism”.

Conclusion: Supero-temporal small incision cataract surgery associated with modest astigmatism & with the rule astigmatism contrary to superior group (against the rule astigmatism), earlier stabilization of refraction, better visual acuity.

Keywords: Astigmatism, superior incision (SI), supero-temporal incision (STI), small incision cataract surgery (SICS), With The Rule Astigmatism (WTR), Against The Rule Astigmatism (ATR), Surgically Induced Astigmatism (SIA), Visual Acuity (VA), No Astigmatism (NA).

References

  1. Miller SJ, Parson’s Diseases of Eye, Edinburgh: Butterworth Heinmann International Edition, 18th edition 1990; 63-69.
  2. Merriam JC, Zheng L, Merriam JE, Zaider M, Lindstrom B. The effect of incisions for cataract on corneal curvature. Ophthalmology. 2003 sep; 110(9): 1807-13.
  3. Koch PS. The structural analysis of cataract incision construction. J Cataract Refract Surg1991; 17(suppl): 661-67.
  4. Armeniades CD, Boriek A, Knodle GE Jr. Effect of incision length, location, & shape on local corneoscleral deformation during cataract surgery. J Cataract Refract Surg, 1990; 16(1): 83-87.
  5. Holladay JT, Dudeja DR, Koch DD. Evaluating & reporting astigmatism for individual & aggregate Data. J Cataract Refract Surg 1998;24:57-65 (PUBMED).
  6. Burgansky Z, Isakov I, Avizemer H, Bartov E. Minimal astigmatism after sutureless, planned extracapsular cataract extraction. J Cataract Refract Surg2002; 28:499-503.
  7. Merriam JC, Zheng L, Urbanowicz J, Zaider M. Change on the horizontal & vertical meridians of the cornea after cataract surgery. Trans Am Ophthalmol Soc.2001;99:187-95.
  8. Kimura H, Kuroda S, Mizoguchi N, Terauchi H, Matsumura M, Nagata M. Extracapsular cataract extraction with a sutureless incision for dense cataracts. J Cataract Refract Surg 1999; 25:1275-9.
  9. Gokhale NS, Sawhney S. Reduction in the astigmatism in manual small incision cataract surgery through change of incision site. Indian Journal of Ophthalmology; sept 2005;3:201.
  10. Miller SJ, Parson’s Diseases of Eye, Edinburgh: Butterworth Heinmann International Edition, 18th edition 1990; 63-69.
  11. Merriam JC, Zheng L, Merriam JE, Zaider M, Lindstrom B. The effect of incisions for cataract on corneal curvature. Ophthalmology. 2003 sep; 110(9): 1807-13.
  12. Koch PS. The structural analysis of cataract incision construction. J Cataract Refract Surg1991; 17(suppl): 661-67.
  13. Armeniades CD, Boriek A, Knodle GE Jr. Effect of incision length, location, & shape on local corneoscleral deformation during cataract surgery. J Cataract Refract Surg, 1990; 16(1): 83-87.
  14. Holladay JT, Dudeja DR, Koch DD. Evaluating & reporting astigmatism for individual & aggregate Data. J Cataract Refract Surg 1998;24:57-65 (PUBMED).
  15. Burgansky Z, Isakov I, Avizemer H, Bartov E. Minimal astigmatism after sutureless, planned extracapsular cataract extraction. J Cataract Refract Surg2002; 28:499-503.
  16. Merriam JC, Zheng L, Urbanowicz J, Zaider M. Change on the horizontal & vertical meridians of the cornea after cataract surgery. Trans Am Ophthalmol Soc.2001;99:187-95.
  17. Kimura H, Kuroda S, Mizoguchi N, Terauchi H, Matsumura M, Nagata M. Extracapsular cataract extraction with a sutureless incision for dense cataracts. J Cataract Refract Surg 1999; 25:1275-9.
  18. Gokhale NS, Sawhney S. Reduction in the astigmatism in manual small incision cataract surgery through change of incision site. Indian Journal of Ophthalmology; sept 2005;3:201.

Corresponding Author

Dr Suresh Chandra Swain, MS

Associate Professor of Ophthalmology, S.C.B. Medical College, Cuttack, Odisha