Comparison of Postoperative Astigmatism after Phacoemulsification Surgery between Horizontal and Oblique Incisions

Document Type : Original Article (s)

Authors

1 Assistant Professor, Department of Ophthalmology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.

2 Associate Professor, Department of Ophthalmology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.

3 General Practitioner, Isfahan University of Medical Sciences, Isfahan, Iran.

Abstract

AbstractIntroduction: Phacoemulsification is a new and modern cataract surgery; although surgically induced astigmatism is an unavoidable complication. The site of incision is an important factor in complication. The horizontal incision is a safer method of surgery; but in practice, surgeons prefer to make easier oblique incision. So we compared surgically induced astigmatism after these incisions.Methods: In a randomized prospective clinical study, 66 patients with ≤ 1 diopter (D) astigmatism were evaluated. Horizontal and oblique clear corneal incisions were performed. Topography values were evaluated and changes in surgically induced astigmatism were calculated by vector analysis; independent t-test was used to compare mean values.Finding: The mean surgically induced astigmatism was 0.95 ± 0.57 diopters (D) in the oblique incision group and 0.83 ± 0.56 (D) in horizontal incision group. The difference in surgical induced astigmatism between two incision types was not statistically significant (P = 0.73)Conclusion: There is not any statistically significant difference in surgical induced astigmatism between oblique and horizontal incision groups.

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References

  1. Riordan-Eva P, Whitcher J. Vaughan & As-bury's General Ophthalmology. 16th ed. New York: McGraw-Hill Medical; 2004. p. 173-9.
  2. Wikipedia. Cataract [online]. [cited 2011 Jan17]. Available from: URL:http://en.wikipedia.org/wiki/Cataract#cite_note-2
  3. Foster A. Vision 2020: the cataract challenge. Community Eye Health 2000; 13(34): 17–9.
  4. Memon MS. Prevalence and causes of blindness in Pakistan. J Pak Med Assoc 1992; 42(8): 196-8.
  5. Durrani J. Helping the blind and the visually handicapped (but not by passing the Hat around). J Pak Ophthol 1996; 12(3): 77.
  6. Brian G, Taylor H. Cataract blindness-challenges for the 21st century. Bull World Health Organ 2001; 79(3): 249-56.
  7. Sinskey RM. A history of modern cataract surgery [online]. Cataract and Refractive Surgery Today 2006; Available from: URL: http://www.crstoday.com/PDF%20Articles/0706/CRST0706_01.pdf
  8. Frey R. Extracapsular cataract extraction [online]. Available from: URL:http://www.surgeryencyclopedia.com/Ce-Fi/Extracapsular-Cataract-Extraction.html
  9. Kelman CD. Phaco-emulsification and aspira-tion. A new technique of cataract removal. A preliminary report. Am J Ophthalmol 1967; 64(1): 23-35
  10. Claoue C. Refractive surgery and patients with cataract. In: Claoue C. Laser and Conventional Refractive Surgery in Ophthalmology. 1st ed. Hoboken, NJ: Wiley-Blackwell; 1996. p. 129-56.
  11. Masket S, Tennen DG. Astigmatic stabiliza-tion of 3.0 mm temporal clear corneal cataract incisions. J Cataract Refract Surg 1996; 22(10): 1451-5.
  12. Ohrloff C. Comparison of phacoemulsifica-tion and planned extracapsular cataract extraction. Klin Monbl Augenheilkd 1993; 203(2): 93-8. [In German].
  13. Gogate PM, Kulkarni SR, Krishnaiah S, Desh-pande RD, Joshi SA, Palimkar A, et al. Safety and efficacy of phacoemulsification compared with manual small-incision cataract surgery by a randomized controlled clinical trial: six-week results. Ophthalmology 2005; 112(5): 869-74.
  14. Kansas P. Phacofracture. In: Rozakis GW, Anis AY, Bryant WR, Fry LL, Kansas P, Keener GT, Editors. Cataract Surgery: Alternative Small Incision Techniques. Thorofare, NJ: Slack Inc; 1990. p. 45-70.
  15. Nichamin LD. Treating astigmatism at the time of cataract surgery. Current Opinion in Ophthalmology 2003; 14(1): 35-8.
  16. Ozkurt Y, Erdoğan G, Güveli AK, Oral Y, Ozbaş M, Cömez AT, et al. Astigmatism after superonasal and superotemporal clear corneal incisions in phacoemulsification. Int Ophthalmol 2008; 28(5): 329-32.
  17. Roman S, Ullern M. Astigmatism caused by superior and temporal corneal incisions in cataract surgery. J Fr Ophtalmol 1997; 20(4): 277-83. [In French].
  18. Barequet IS, Yu E, Vitale S, Cassard S, Azar DT, Stark WJ. Astigmatism outcomes of hori-zontal temporal versus nasal clear corneal incision cataract surgery. J Cataract Refract Surg 2004; 30(2): 418-23.
  19. Tejedor J, Murube J. Choosing the location of corneal incision based on preexisting astigmatism in phacoemulsification. Am J Ophthalmol 2005; 139(5): 767-76.
Journal of Isfahan Medical School
Volume 28, Issue 115 - Serial Number 115
September and October 2011
Pages 935-939

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History

  • Receive Date: 06 March 2011
  • Revise Date: 29 April 2024
  • Accept Date: 06 April 2022

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