Evaluation of Corneal Curvatural Changes After Astigmatism Friendly Phacoemulsification Incisions in Cataract Surgery
Evaluation of Corneal Curvatural Changes After Astigmatism Friendly Phacoemulsification Incisions
DOI:
https://doi.org/10.70284/njirm.v8i3.1251Keywords:
clear corneal, refraction , against the ruleAbstract
Background and objectives: A cross sectional study was conducted at New Civil Hospital, Surat to evaluate changes in corneal curvature 1,1½ &2 years after on axis phacoemulsification surgery incisions. Method: 50 patients having undergone clear corneal phacoemulsification with astigmatism friendly incisions and foldable intraocular lens implantation 1 to 2 years back with detailed preoperative data were seen. They were grouped as 1(Group A) ,1½(Group B) and 2years (Group C) post surgery follow ups. Their postsurgery corneal curvature and refraction was observed at time of study and was compared to same at 40th day after surgery. Results: Mean post op astigmatism in group A (0.50±0.25), Group B (0.51 ± 0.30) and Group C (0.75±0.29) were observed. The mean change in corneal curvature as compared to baseline was not significant statistically in Group A (p=0.6) and Group B (p = 0.6).In Group C the change corneal curvature of 0.22 D was statistically significant by t tests. The mean change in refraction was not significant statistically in all three groups. Conclusion: Against the rule change in corneal curvature , independent of type of incision seen after 2 years of surgery which can be age related. Thus reassessment of refraction is not required frequently in astigmatism friendly incisions. [Foram D NJIRM 2017; 8(3):75-77]
References
2. Fine, I. Howard MD; Hoffman, Richard S. Refractive aspects of cataract surgery. Cuurent opinion in ophthalmology, 1996.
3. Sujithra H, Meenakshi Dhar, Dhireesh, Robin Shanmugham- Assessment of Merits of Clear Corneal Incision over Scleral Tunnel Incision in Phacoemulsification. Kerala Journal of Ophthalmology Sept 2008 Vol. XX, No. 3.
4. Piers Percival and Nicholas Beare - Clear cornea sutureless phacoemulsification and astigmatic decay after two years, 1997. (Eye) Royal College of Ophthalmologists (1997) 11, 381-384 .
5. Hayashi K(1), Hirata A, Manabe S, Hayashi H.1.- Long-term change in corneal astigmatism after sutureless cataract surgery. Am J Ophthalmol. 2011 May;151(5):858-65.
6. John C. Merriam, Lei Zheng, Joanna Urbanowic,Marco Zaider - Change on the horizontal and vertical meridians of the cornea after cataract surgery, 2001. Tr Am Ophth Soc 2001;99:187-197.
7. L.Zheng and J.C.Merriam – The effect of incisions for cataract on the major axis of corneal curvature, Invest Ophthalmol Vis Sci 2005;46-48
8. S M Salvi, S Akhtar and z currie- Ageing changes in the eye, Postgrad Med J.2006 Sept; 82 (971): 581 – 7. Hayashi K, Masumoto M,Fujino S, Hayashi F- Changes in corneal astigmatism with aging. Nihon Ganka Gakkai Zasshi, Oct 97 (10)
9. Hayashi K, Masumoto M,Fujino S, Hayashi F- Changes in corneal astigmatism with aging. Nihon Ganka Gakkai Zasshi, Oct 97 (10).
