Effects of femtosecond laser-assisted cataract surgery on corneal astigmatism and SIA in patients with age-related cataract

• Main Author: Jie Niu
• Format: Article
• Language: English
• Published: Press of International Journal of Ophthalmology (IJO PRESS) 2018-10-01
• Series: Guoji Yanke Zazhi
• Subjects: femtosecond; laser; cataract; surgically induced astigmatism
• Online Access: http://ies.ijo.cn/cn_publish/2018/10/201810019.pdf

AIM:To explore the effects of femtosecond laser-assisted cataract surgery(FLACS)on corneal astigmatism and surgically induced astigmatism(SIA)value in patients with age-related cataract. <p>METHODS: Totally 152 cases of age-related cataract patients(233 eyes)admitted to our hospital were divided into the study group(<i>n</i>=70, 107 eyes, given the FLACS)and the control group \〖<i>n</i>=82, 126 eyes, given the traditional phacoemulsification cataract surgery(TS)\〗 according to the economic conditions and voluntary principles. Corneal astigmatism degree and SIA value were compared between the two groups. <p>RESULTS: The effective ultrasound time, average ultrasound energy, and total operative time in the study group were less than those in the control group(<i>P</i><0.05). There was no significant difference in the intraocular pressure between the two groups before operation and at 1 and 3mo after operation(<i>P</i>>0.05). The difference in intraocular pressure was statistically significant of the two groups at different time points(<i>P</i><0.05). The two groups showed a downward trend in intraocular pressure(<i>P</i><0.05). There were statistically significant differences in the accumulated energy complex parameter(CDE)values of phacoemulsification between the two groups of grade Ⅱ nuclear and grade III nuclear surgery, and the intraoperative CDE value of grade Ⅲ nuclear in the two groups was higher than that of grade Ⅱ nuclear(<i>P</i><0.05). The difference in visual acuity and best corrected visual acuity between the two groups at different time points was statistically significant(<i>P</i><0.05). The uncorrected visual acuity and best corrected visual acuity were significantly improved in the two groups(<i>P</i><0.05). The uncorrected visual acuity and best corrected visual acuity in the study group were better than those in the control group at 1mo after operation(<i>P</i><0.05), but there was no significant difference at 3mo after operation(<i>P</i>>0.05). There was no significant difference in corneal astigmatism between the two groups and at different time points(<i>P</i>>0.05). There was no significant difference in surgical astigmatism between-groups at 1 and 3mo after operation(<i>P</i>>0.05).The surgical astigmatism at 3mo after operation was lower than that at 1mo after operation(<i>P</i><0.05). There were significant differences in corneal endothelial cell counts between the two groups at different time points(<i>P</i><0.05). There was no significant difference in corneal endothelial cell counts in the study group before operation and at 1mo after operation(<i>P</i>>0.05). The corneal endothelial cell counts in control group at 1mo after operation was lower than that before operation(<i>P</i><0.05). There was no significant difference in the corneal endothelial cell counts between the two groups before operation and at 1mo after operation(<i>P></i>0.05). The corneal endothelial cell counts in the study group were significantly more than those in the control group at 3mo after operation(<i>P</i><0.05). The corneal endothelial loss rate was significantly lower in the study group at 1 and 3mo after operation than that in the control group(<i>P</i><0.05). <p>CONCLUSION: FLACS can effectively improve the postoperative visual acuity in patients with age-related cataract, and it will not increase the postoperative corneal astigmatism and SIA.