Comparison Between FS- LASIK and FS-SMILE for Correction of Myopia and Myopic Astigmatism

Summary

Aim of the work is to compare the results of femtosecond assisted LASIK and small incision lenticule extraction (SMILE) as regards safety, efficacy and predictability. As a secondary outcomes , the investigators will compare the results of both techniques on corneal biomechanics, dry eye measures, corneal asphericity and higher order aberration.

Conditions

• Myopia

Interventions

PROCEDURE

FS-SMILE

The procedure will be performed using an established technique. the patient's eye will be centered and docked with the curved interface cone before application of suction fixation.The laser will be activated for photo-dissection in the following sequence: first the posterior surface of the refractive lenticule then the lenticule border then The anterior surface of the refractive lenticule which extended beyond the posterior lenticule diameter by 0.5 mm to form the anterior flap and is followed by a rim cut. After the suction is released, a Siebel spatula is inserted under the cap near the hinge before the cap is separated. The edge of the refractive lenticule is separated from the stromal bed with a sinsky hook and the posterior border of the lenticule gently separated with the Siebel spatula. The lenticule is then grasped with forceps through the small incision.

PROCEDURE

FS- LASIK

LASIK procedure Each LASIK procedure will be performed using a standard, established technique. Under topical anesthesia and standard draping, a lid speculum is used to retract the eyelids. A superiorly hinged 100 μm thick flap will be created using the WaveLight FS200 (Alcon Laboratories, Inc.) With inverted side cut (115 ̊) .Excimer laser ablation is then performed using WaveLight EX500 excimer laser (Alcon Laboratories, Inc.).After ablation, the flap will be carefully repositioned, and postoperative medications are commenced.

DEVICE

Visumax device

DEVICE

FS 200 device

Sponsors & Collaborators

• Kasr El Aini Hospital

  lead OTHER

Principal Investigators

• Mohsen N Salem, MD · Kasr alainy school of medicine

• mohamed H hosny, MD · Kasr alainy school of medicine

• MOHAMED ANIS, MD · Kasr alainy school of medicine

Study Design

Allocation

NON_RANDOMIZED

Purpose

TREATMENT

Masking

NONE

Model

PARALLEL

Eligibility

Min Age

18 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2015-03-31

Primary Completion

2016-12-31

Completion

2017-02-28

Countries

• Egypt

Study Locations