Article PDF :

Veiw Full Text PDF

Article type :

Original Article

Author :

Bansari Vadodaria, Aishwariya Thakre, Rupali Maheshgauri, Divya Motwani, Ashish Mishra

Volume :

5

Issue :

4

Abstract :

Purpose: To study pterygium induced astigmatism. In this study, we have analyzed our results of refractive status of pterygium patient after pterygium excision surgery. Up till now we have seen pterygium induced astigmatism but with the help of this study we would like to find out refractive status of patient post operatively which will help in refractive cataract surgery of patient having both pterygium and cataract. Materials and Methods: Descriptive study was undertaken of 50 cases of patients diagnosed to have pterygium induced astigmatism. Patients were explained about the study after which written and informed consent was taken about their participation in the study. Demographic factors like age, sex, occupation and address were recorded. Complete ophthalmic and medical history was taken, Visual acuity using Snellen’s chart, Refractive status was deduced. Keratometery observed for horizontal and vertical diameters corneal diopter by bausch and lomb keratometry. Pterygium induced astigmatism which were operated by pterygium excision and conjuctival autograf t with suture or without suture. Patients were examined on post operative day 1,7,21 for refractive status where the refractive status of patients with pterygium preoper ative and post operative with conjunctival autograft with suture and without suture was evaluated. Data was entered in Microsoft Excel and statistical analysis was done using software EpiInfo or SPSS. Quantitative data was analysed in terms of Means and Standard Deviation. Qualitative data was analysed with appropriate test of significance like Unpaired T test and Paired T test. The probability level of 0.05 was considered as statistically significant. Result: There was significant difference was seen in mean KV and KH pre-operatively, on post operative day 1 after pterygium excision surgery with conjunctival autograft with or without suture and on regular follow up (p = 0.000), such that KV decreases while KH increases following surgery and serial follow up. Mean (KV minus KH) pre-operatively, on post operative day 1 and on regular follow up was statistically significant (p = 0.000). (KV minus KH) decreases after pterygium excision surgery with conjunctival autograft with or without suture. Spherical and Astigmatic error reduces significantly after pterygium excision surgery with conjunctival autograft with or without suture(p = 0.000). Conclusion: Pterygium leads to significant high corneal astigmatism, which hampers vision of the patient. Pterygium causes horizontal meridian flattening (KH).We concluded that, pterygium causes simple myopic with the rule type of astigmatism and compound hypermetropic and myopic astigmatism type of refractive error. With the rule astigmatism was most common pre-operatively. There is drastic changes in keratometry readings pre-operatively and post surgical excision of pterygium tissue. Overall, after pterygium excision surgery most of the patients had no refractive error except simple myopic type of refractive error. After pterygium excision surgery astigmatism was reduced, in compound astigmatic type of refractive error. There is definite change in refractive status in pterygiyum post pterygium surgery so with this study I would like to deduce that, to get emmetropic status for cataract surgery or refractive cataract surgery pterygium tissue excision should be done.