Influence of Incision Size on Dry Eye Symptoms in the Small Incision Lenticule Extraction Procedure

Abstract Purpose This study aimed at comparing femto-LASIK with small incision lenticule extraction (SMILE) as regards the safety, efficacy, accuracy and post-operative complications with special emphasis on the post-operative dry eye, corneal sensation and corneal biomechanics in cases of myopia and myopic astigmatism. Patients and Methods The study was a prospective comparative study that was conducted in a private eye hospital on 60 eyes of 30 patients with myopia or myopic astimgatism. Each patient was fully assessed preoperatively including visual acuity, refraction, tear breakup time, Schirmer test, corneal sensation & Ocular Response Analyzer®. Femto-LASIK was done to 15 patients and SMILE was done to 15 patients. Postoperative visual acuity, refraction, tear breakup time, Schirmer test, corneal sensation at 1 month, 3 months and 6 months and Ocular Response Analyzer® at 6 months were done and data was retrieved and analyzed. Results Cylindrical error was higher in SMILE group at all postoperative points. Tear breakup time was better in SMILE group in 1st month, but no significant difference in later follow ups. Corneal sensation was better in SMILE group in 1 month and 3 months, but this difference disappeared at 6 months. Corneal hysteresis & corneal resistance factor were significantly better in SMILE group. Conclusion Both techniques are safe and efficient. Femto-LASIK is more efficient in correcting cylindrical error. SMILE is better in early postoperative dry eye, corneal sensation and in corneal biomechanics.

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Comparison of Dry Eye and Corneal Sensitivity between Small Incision Lenticule Extraction and Femtosecond LASIK for Myopia

PLoS ONE ◽

10.1371/journal.pone.0077797 ◽

2013 ◽

Vol 8 (10) ◽

pp. e77797 ◽

Cited By ~ 63

Author(s):

Meiyan Li ◽

Jing Zhao ◽

Yang Shen ◽

Tao Li ◽

Li He ◽

...

Keyword(s):

Dry Eye ◽

Small Incision Lenticule Extraction ◽

Corneal Sensitivity ◽

Small Incision ◽

Lenticule Extraction

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Dry Eye After Small Incision Lenticule Extraction and Femtosecond Laser–Assisted LASIK

Cornea ◽

10.1097/ico.0000000000000999 ◽

2017 ◽

Vol 36 (1) ◽

pp. 85-91 ◽

Cited By ~ 35

Author(s):

Hidenaga Kobashi ◽

Kazutaka Kamiya ◽

Kimiya Shimizu

Keyword(s):

Femtosecond Laser ◽

Dry Eye ◽

Small Incision Lenticule Extraction ◽

Small Incision ◽

Lenticule Extraction

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Small Incision Lenticule Extraction for Correction of Myopia and Myopic Astigmatism: First 24-Hour Outcomes

Journal of Ophthalmology ◽

10.1155/2017/5824534 ◽

2017 ◽

Vol 2017 ◽

pp. 1-6 ◽

Cited By ~ 2

Author(s):

Taixiang Liu ◽

Tingting Dan ◽

Yan Luo

Keyword(s):

Corneal Thickness ◽

Extraction Procedure ◽

Corneal Edema ◽

Pain Level ◽

Small Incision Lenticule Extraction ◽

Small Incision ◽

Corneal Densitometry ◽

Uncorrected Visual Acuity ◽

Lenticule Extraction ◽

Myopic Astigmatism

Purpose. To observe the first 24-hour (h) outcomes of the small incision lenticule extraction procedure (SMILE) for myopia and myopic astigmatism.Methods. Fifty-three eyes (27 patients) scheduled for SMILE were followed immediately (0 h), 2, 4, 6, and 24 h after SMILE. Uncorrected visual acuity (UCVA), conjunctival congestion, pain level, and corneal edema, thickness, and densitometry were recorded.Results. At 2 h after SMILE, 15.1% of eyes had ≤0.1 LogMAR UCVA; this increased to 62.3%, 98.1%, and 100% at 4, 6, and 24 h, respectively. Some eyes (33.96%) had mild corneal edema immediately after surgery. No 6 h postoperative edema was observed. In the first 24 h after SMILE, corneal thickness gradually decreased. Postoperative corneal densitometry values were significantly higher than preoperative values but gradually decreased during the first postoperative 24 h.Conclusions. In the first postoperative 24 h, UCVA and corneal status (edema and densitometry) improved quickly.

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