Abstract:
Cataracts are the primary cause of blindness in the world. Manual Small Incision Cataract Surgery
(MSICS) is a commonly used method for cataract surgery, especially in countries with limited
resources, delivering impressive visual results without requiring advanced technology. However,
a major post-operative issue is the emergence of surgically induced astigmatism (SIA), which can
affect visual results and patient satisfaction. Therefore, evaluating SIA and its related factors
following MSICS is essential.
Objective
This study aimed to determine the magnitude and associated factors of surgically induced
astigmatism after MSICS at JUMC Department of Ophthalmology from November 2024 to
January 2025.
Method
A prospective cross sectional study design was conducted at JUMC department of ophthalmology
from November 2024 to January 2025 on patients undergoing MSICS. By using Consecutive
sampling technique data was collected by questioner during preoperative, intraoperative and
postoperative period. SIA was calculated using hills SIA calculator version 2.1. The collected data
was analysed using SPSS version 26 and univariate and multivariate logistic regression was used
to identify associated factors of SIA.
RESULT
A total of 222 eyes of 193 individuals were studied. The centroid SIA and Aithmethic mean SIA
of the study was 1.31D x 5o axis and 2.08 + 1.26D respectively. SIA ranged from 0.13D to
5.65D. Scleral incision length and shape of scleral incisions were major associated factors of
SIA from multivariate logistic regression analysis.
Conclusion and recommendation
Scleral incision length <7mm and frown shaped scleral incisions resulted in lower SIA
magnitude. It is recommended to measure the scleral incision length with caliper to
minimize SIA in the center.
