Author :
Vimlesh Sharma
Volume :
2
Issue :
1
Abstract :
Aim: To compare the effect of clear corneal incision and sclera tunnel incision on central corneal thickness in eyes undergoing phacoemulsification.
Setting: Department of ophthalmology, Government Medical College Haldwani, Nainital, Uttarakhand.
Materials and Methods: This prospective study included 68 eyes with senile cataract from grade 1 to 3 which underwent phacoemulsification during May 2015 to October 2015 through clear corneal incision or through sclera tunnel incision. Patients were randomly assigned in group 1 with clear corneal incision and group 2 with sclera tunnel incision. All the surgeries were performed by single surgeon using same technique. Postoperatively central corneal thickness were measured with optical non-contact biometry in both the groups on 2nd post-op day, at 1-2 weeks, 6-8 weeks and at 3 months and compared.
Results: Mean increase in CCT on 2nd postoperative day was 82µm and 62 µm in Group I and Group II respectively. At 2 weeks it was 51 µm and 23 µm, at 6 weeks it was 30 u µm and 5 µm, at 3 months 4 µm and 5 µm more than the baseline values.
Conclusion: This study revealed that increased CCT as caused by corneal oedema occurring in immediate postoperative period was more in Group I as compared to Group II. The values returned to normal range in 3 months and 2 months in Group I and Group II respectively.
Key words: Clear corneal incision, Central corneal thickness, Scleral tunnel incision