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First Author: M.Shoja IRAN
Co Author(s): M. Mahdavi N. Oveisi
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Intraoperative complications of LASIK are mostly preventable, and awareness of results and complications and causes of the complications could be a guide to next steps and crisis management.
Understanding different flap complications and also preventive and curative strategies are of much importance
This is a descriptive, retrospective and cross-sectional study. we studied data recorded in all patients file whom presented in LASIK surgery center and undergone LASIK surgeryIn this study we divided age groups into 6 groups with 5year intervals, however the last group(sixth one) consisted of 6th and 7th groups because the number of cases were inconsiderable in these two groups.
In our study 1000 patients (395 males and 605 females) were analyzed. 23 patients (2.3%) were hyperopic and 977 patients(97.7%) were myopic. Among these 1000 patients,16 patients(1.6%) were affected by flap related complications. The most common flap related complication was incomplete flap found in 16 complicated patients(56.3%). Other complications in order of frequency were irregular flap,5 patients(31.3%)buttonhole,2patients(12.5%) and free flap and thin flap in none of patients(0.0%). The most frequent complications were seen in age group of 40-45 yr (9.5%) and the least complications seen in age group of 30-35(0.7%),and this difference was statistically significant.(P value=0.027). 9 males and 7 females in our study were complicated, Which means 2.3% of males and 1.2% of females that this was statistically no significant. All complicated patients were myopic. Patients who had corneal thickness of 580-590ṁ had the most intraopertative complications. Also in our study, statistically significant difference was seen between anterior corneal radius of curvature and incidence of complications. Increase in anterior corneal radius of curvature leads to increase in incidence of complications.According to our results intraoperative complications in the group with posterior corneal radius of curvature of 6-6.49ṁ were the highest amongst,3.1%(P-value=0.002).
Studying the intraopertaive LASIK complications has been widely done worldwide, and different prevalence of complication rates from 0.3%(11) to 20%(21) has been reported. Flap complication rates are different in every study. An important and necessary step in LASIK surgery is to create flap, which is possible using different models of microkeratomes. Two most common used microkeratomes are mechanical and femtosecond. Many surgeons still use mechanical microkeratome. In this study we used a mechanical microkeratome too and in our study like some other studies. the most frequent complication with mechanical microkeratome reported to be incomplete flap. However experience and skill of surgeon play an important role in flap related complications,