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First Author: L.Mastropasqua ITALY
Co Author(s): L. Vecchiarino R. Calienno A. Mastropasqua P. Mattei C. De Nicola L. Mastropasqua
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To evaluate capsulorhexis cut quality obtained during femtosecond laser-assisted cataract surgery (FCSL) at different energy settings and to evaluate if differences exist with that obtainable with a standard manual technique, using scanning electron microscopy (SEM).
Ophthalmology Clinic, Department of Medicine and Science of Ageing, University "G. D"Annunzio" Chieti-Pescara, Italy
Sixty capsulorhexises obtained by means of conventional manual technique and by means of FCSL with different laser energy settings were divided into five groups: group 1 (12 rhexis) obtained with manual technique and groups 2 to 5 (each with 12 rhexis) obtained with FCSL at 7, 13.5, 14 and 15microjoules,respectively. All samples were evaluated by means of SEM to compare the thickness along the rhexis edge and overall irregularity of the cut surface.
Rhexes obtained with FCSL at all energy settings had perfectly circular with negligible deformation. Groups 1 and 2 showed a significantly higher and lower thickness, respectively, of the rhexis edge compared to the other three groups (p<0.001). There was also a statistically significant correlation between the degree of irregularity and increasing energy (p<0.001).
In conclusion, the use of FCSL in cataract surgery resulted in a better rhexis geometry and circularity while maintaining a similar degree of irregularity of the cut surface when lower energy settings were used.