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Comparison of the Optical Quality between Small Incision Lenticule Extraction and Femtosecond Laser LASIK

View Article: PubMed Central - PubMed

ABSTRACT

Purpose. To investigate the visual quality after SMILE and Femto-LASIK. Methods. About 123 eyes from 63 patients were enrolled in this study. The parameters were measured preoperatively and 1 week, 1 month, and 3 months postoperatively using Sirius System. Results. The MTF curve increase slightly from low to high frequency at 3 mm and 6 mm pupil diameter after SMILE surgery (P < 0.05) during the follow-up time comparing with the preoperative values. And the SR has a significant increase at various pupil diameters as well (P < 0.05). However, there was little increase for MTF at intermediate to high frequency at 3 mm pupil diameter after Femto-LASIK procedure (P < 0.05). And the SR had only significant increase at 3 mm pupil diameter. Between SMILE and Femto-LASIK, there was no statistic difference both in MTF and SR (P > 0.05) at 3 mm pupil diameter at vertical and horizontal meridian. However, significant difference was found in MTF at low to mediate frequency at 6 mm pupil diameter at vertical meridian at 1 week postoperatively (P < 0.05). Conclusions. Both SMILE and Femto-LASIK show a great improvement in optical quality at small diameter. It was found that SMILE shows better optical quality than Femto-LASIK at larger pupil diameter, which might be good for the night vision.

No MeSH data available.


The changes of MTF values before and 1 week, 1 month, and 3 months after SMILE procedure. (a) The change of MTF curve at vertical meridian at 3 mm pupil diameters; (b) the change of MTF curve at horizontal meridian at 3 mm pupil diameters; (c) the change of MTF curve at vertical meridian at 6 mm pupil diameters; (d) the change of MTF curve at horizontal meridian at 6 mm pupil diameters. ∗Significant difference among different follow-up times.
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fig1: The changes of MTF values before and 1 week, 1 month, and 3 months after SMILE procedure. (a) The change of MTF curve at vertical meridian at 3 mm pupil diameters; (b) the change of MTF curve at horizontal meridian at 3 mm pupil diameters; (c) the change of MTF curve at vertical meridian at 6 mm pupil diameters; (d) the change of MTF curve at horizontal meridian at 6 mm pupil diameters. ∗Significant difference among different follow-up times.

Mentions: The MTF curve of the corneal surface at vertical and horizontal meridian increase significantly from low to high frequency at 3 mm pupil diameter after SMILE procedure (P < 0.05 for all) during the follow-up time (Figures 1(a) and 1(b)). However, the MTF values only showed significant increase at vertical meridian from low to high frequency at 6 mm pupil diameter before and after SMILE procedure (P < 0.05 for all) (Figures 1(c) and 1(d)).


Comparison of the Optical Quality between Small Incision Lenticule Extraction and Femtosecond Laser LASIK
The changes of MTF values before and 1 week, 1 month, and 3 months after SMILE procedure. (a) The change of MTF curve at vertical meridian at 3 mm pupil diameters; (b) the change of MTF curve at horizontal meridian at 3 mm pupil diameters; (c) the change of MTF curve at vertical meridian at 6 mm pupil diameters; (d) the change of MTF curve at horizontal meridian at 6 mm pupil diameters. ∗Significant difference among different follow-up times.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC5121460&req=5

fig1: The changes of MTF values before and 1 week, 1 month, and 3 months after SMILE procedure. (a) The change of MTF curve at vertical meridian at 3 mm pupil diameters; (b) the change of MTF curve at horizontal meridian at 3 mm pupil diameters; (c) the change of MTF curve at vertical meridian at 6 mm pupil diameters; (d) the change of MTF curve at horizontal meridian at 6 mm pupil diameters. ∗Significant difference among different follow-up times.
Mentions: The MTF curve of the corneal surface at vertical and horizontal meridian increase significantly from low to high frequency at 3 mm pupil diameter after SMILE procedure (P < 0.05 for all) during the follow-up time (Figures 1(a) and 1(b)). However, the MTF values only showed significant increase at vertical meridian from low to high frequency at 6 mm pupil diameter before and after SMILE procedure (P < 0.05 for all) (Figures 1(c) and 1(d)).

View Article: PubMed Central - PubMed

ABSTRACT

Purpose. To investigate the visual quality after SMILE and Femto-LASIK. Methods. About 123 eyes from 63 patients were enrolled in this study. The parameters were measured preoperatively and 1 week, 1 month, and 3 months postoperatively using Sirius System. Results. The MTF curve increase slightly from low to high frequency at 3&thinsp;mm and 6&thinsp;mm pupil diameter after SMILE surgery (P &lt; 0.05) during the follow-up time comparing with the preoperative values. And the SR has a significant increase at various pupil diameters as well (P &lt; 0.05). However, there was little increase for MTF at intermediate to high frequency at 3&thinsp;mm pupil diameter after Femto-LASIK procedure (P &lt; 0.05). And the SR had only significant increase at 3&thinsp;mm pupil diameter. Between SMILE and Femto-LASIK, there was no statistic difference both in MTF and SR (P &gt; 0.05) at 3&thinsp;mm pupil diameter at vertical and horizontal meridian. However, significant difference was found in MTF at low to mediate frequency at 6&thinsp;mm pupil diameter at vertical meridian at 1 week postoperatively (P &lt; 0.05). Conclusions. Both SMILE and Femto-LASIK show a great improvement in optical quality at small diameter. It was found that SMILE shows better optical quality than Femto-LASIK at larger pupil diameter, which might be good for the night vision.

No MeSH data available.