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[The impact of different incisions on visual acuity and corneal refractivity in cataract surgery]
1Department of Ophthalmology, Affiliated Fourth Hospital, West China University of Medical Sciences, Chengdu.
Objective:
To research the impact of different incisions of cataract surgery on post-operative visual acuity and corneal refractivity.
Methods:
The visual acuity and corneal refractivity in 243 eyes having undergone extracapsular cataract extraction and phacoemulsification with 5 mm tunnel incision or 7 mm frown-shaped incision were examined and compared at three post-operative periods.
Results:
The mean increase in corneal refractivity in phacoemulsification group was significantly less (P < 0.05) and the corrected visual acuity was much better (P < 0.05) than that in conventional extracapsular cataract extraction (ECCE) group at post-operative 1/2 month, 3 months and 6 months (P < 0.05). In the phacoemuisification group, the increase of the post-operative refractivity in 7 mm frown-shaped incision group was less than that in 5 mm tunnel incision group at 1/2 month and 3 months (P < 0.05).
Conclusion:
7 mm frown-shaped incision of phacoemulsification is the most effective method to control the post-operative corneal astigmatism in cataract surgery.