scholarly journals Comparison of Changes in Corneal Biomechanical Properties after Photorefractive Keratectomy and Small Incision Lenticule Extraction

2016 ◽  
Vol 46 (2) ◽  
pp. 47-51 ◽  
Author(s):  
Yusuf Yıldırım ◽  
Onur Ölçücü ◽  
Abdurrahman Başcı ◽  
Alper Ağca ◽  
Engin Bilge Özgürhan ◽  
...  
Keyword(s):  
Biomechanical Properties ◽  
Photorefractive Keratectomy ◽  
Small Incision Lenticule Extraction ◽  
Small Incision ◽  
Lenticule Extraction ◽  
Corneal Biomechanical Properties

scholarly journals Review of Corneal Biomechanical Properties Following LASIK and SMILE for Myopia and Myopic Astigmatism

2018 ◽  
Vol 12 (1) ◽  
pp. 164-174 ◽  
Author(s):  
Iben Bach Damgaard ◽  
Mohamed Reffat ◽  
Jesper Hjortdal
Keyword(s):  
Femtosecond Laser ◽  
Ex Vivo ◽  
Biomechanical Properties ◽  
Small Incision Lenticule Extraction ◽  
Small Incision ◽  
Lenticule Extraction ◽  
A Minor ◽  
Corneal Biomechanical Properties

Worldwide, femtosecond Laser AssistedIn-situKeratomileusis (LASIK) is a well known and commonly used refractive technique, although Small Incision Lenticule Extraction (SMILE) has become increasingly popular since it was introduced in 2011. In LASIK, a corneal flap is cut with a microkeratome or femtosecond laser, followed by thinning of the stromal bed with excimer laser ablation. In SMILE, a minor intrastromal lenticule is cut with a femtosecond laser and subsequently removed through a small incision, leaving the anterior and strongest part of the cornea almost intact. Both LASIK and SMILE require cutting of corneal lamellae that may reduce the biomechanical stability of the cornea, with the potential risk of corneal iatrogenic ectasia as a severe complication. However, SMILE preserves the anterior corneal integrity and may, in theory, better preserve the corneal biomechanical strength than LASIK after surgery.A review aimed to examine the current literature that describes and compares the corneal biomechanical properties after Laser AssistedIn-situKeratomileusis (LASIK) and Small Incision Lenticule Extraction (SMILE). A comprehensive search was performed in Pubmed.gov using the following search queries: Corneal biomechanical properties, corneal biomechanics, ocular response analyser, ocular response analyzer, ORA,ex vivo, in vitro, Corvis, Corvis ST, LASIK, and SMILE.

scholarly journals Evaluation of Corneal Biomechanical Properties Modification after Small Incision Lenticule Extraction Using Scheimpflug-Based Noncontact Tonometer

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Leonardo Mastropasqua ◽  
Roberta Calienno ◽  
Manuela Lanzini ◽  
Martina Colasante ◽  
Alessandra Mastropasqua ◽  
...  
Keyword(s):  
Intraocular Pressure ◽  
Central Corneal Thickness ◽  
Corneal Thickness ◽  
Biomechanical Properties ◽  
Corneal Biomechanics ◽  
Small Incision Lenticule Extraction ◽  
Small Incision ◽  
Lenticule Extraction ◽  
Noncontact Tonometer ◽  
Corneal Biomechanical Properties

Purpose.To quantify the effect of small incision lenticule extraction (SMILE) on the corneal biomechanics using Scheimpflug noncontact tonometer (Corvis ST).Methods.Twenty eyes of twenty patients, evaluated as eligible for surgery, with high myopia and/or moderate myopic astigmatism, underwent small incision lenticule extraction (SMILE). All patients underwent Corvis ST preoperatively and postoperatively after 1 week, and 1 and 3 months to observe alterations of corneal biomechanical properties. The main outcome measures were Deformation Amplitude, 1st-AT, and 2nd-AT. The relationship between the amount of stroma removed and the percentage variation of the measured parameters from baseline was evaluated with generalized linear model from each time point. For completeness also intraocular pressure (IOP), central corneal thickness (CCT), and their variations after surgery were evaluated.Results.The ratio between the amount of removed refractive error and, respectively, changes of Deformation Amplitude, 1st-AT, and 2nd-AT were significantly modified at the 1st week after surgery(P=0.005; P=0.001; P=0.024). At 1 and 3 months these values did not show statistically significant alterations. Intraocular pressure and central corneal thickness showed statistically significant changes during follow-up.Conclusions.No significant modifications in biomechanical properties were observed after SMILE so this procedure could induce only minimal transient alterations of corneal biomechanics.

Visual and Refractive Outcomes of Photorefractive Keratectomy and Small Incision Lenticule Extraction (SMILE) for Myopia

2016 ◽  
Vol 32 (9) ◽  
pp. 604-610 ◽  
Author(s):  
Yusuf Yildirim ◽  
Onur Olcucu ◽  
Cengiz Alagoz ◽  
Abdurrahman Basci ◽  
Alper Agca ◽  
...  
Keyword(s):  
Photorefractive Keratectomy ◽  
Small Incision Lenticule Extraction ◽  
Small Incision ◽  
Refractive Outcomes ◽  
Lenticule Extraction

scholarly journals Corneal densitometry after photorefractive keratectomy, laser-assisted in situ keratomileusis, and small-incision lenticule extraction

Eye ◽  
2017 ◽  
Vol 31 (12) ◽  
pp. 1647-1654 ◽  
Author(s):  
F Poyales ◽  
N Garzón ◽  
J Mendicute ◽  
I Illarramendi ◽  
P Caro ◽  
...  
Keyword(s):  
Photorefractive Keratectomy ◽  
Small Incision Lenticule Extraction ◽  
Small Incision ◽  
Corneal Densitometry ◽  
Lenticule Extraction

scholarly journals Early outcomes after small incision lenticule extraction and photorefractive keratectomy for correction of high myopia

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Tommy C. Y. Chan ◽  
Marco C. Y. Yu ◽  
Alex Ng ◽  
Zheng Wang ◽  
George P. M. Cheng ◽  
...  
Keyword(s):  
High Myopia ◽  
Photorefractive Keratectomy ◽  
Small Incision Lenticule Extraction ◽  
Small Incision ◽  
Lenticule Extraction
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