Treatment of Residual Refraction Errors 6 Months After Trifocal IOL Implantation With Relex-Smile

Myopia Clinical Trial

Official title:

Succesful Treatment of Residual Refraction Errors (Myopic and Hyperopic) 6 Months After Trifocal IOL Implantation With Relex-Smile

Clinical Trial Details — Status: Enrolling by invitation

Administrative data

• NCT number: NCT04712318
• Other study ID #: EHospitalPristina
• Status: Enrolling by invitation
• Phase: N/A
• Start date: June 1, 2016
• Est. completion date: June 1, 2024

Study information

• Verified date: September 2023
• Source: Eye Hospital Pristina Kosovo
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

Successful treatment of residual refraction 6 months after IOL Implantation with Relex-Smile.

Description:

Residual refractive errors(myopia 50% and hyperopia 30%) are the main problems at patients after IOL Implantation.

The residual refraction (myopic and hyperopic) after IOL Implantation is difficult to treat surgically. In addition, there are not many suitable options to offer such patients presenting with this condition.

Two current common surgeries to treat residual hyperopic refraction are refractive lens exchange (RLE) and excimer laser ablation (LASIK or PRK).

Laser procedures: Photorefractive keratectomy (PRK); Laser assisted in situ keratomileusis (LASIK); Risks of LASIK include abnormalities of the corneal flap, epithelial ingrowth, corneal ectasia, refractive surprises, irregular astigmatism, decentration, visual aberrations, a loss of BCVA, infectious keratitis, symptoms, and diffuse lamellar keratitis.

Refractive lens exchange (RLE); The risks of RLE are similar to those of cataract surgery and include endophthalmitis, a loss of accommodation, vitreous loss with posterior capsular rupture, and retinal detachment.

The aim of our study is to investigate the effect of Relex-Smile to treat the residual refraction errors (myopia and hypermetropia) 6 months after IOL Implantation.

Before SMILE, Yag-Laser capsulotomy should be performed on all patients, regardless of posterior capsule ossification, in pseudophakic patients with residual refraction. When the YAG Laser is applied after the SMILE ,there will be a diopter change. In pseudophakic patients with hyperopic astigmatism and residual refraction ,corneal topography-guided intrastromal fresh lenticular implantation should be performed and the lenticule was placed according to the low K value.

At myopic residual refraction(-0.75D till -5.50D) after IOL Implantation The method used at the EYE Hospital Pristina by ReLex-SMILE is safe and effective method, since there is no flap and this prevents invasive damage to the anterior surface of the cornea contrary to the LASIK where flap is present posing risk for epithelial ingrowth.

At hyperopic residual refraction this study is to investigate the effect of fresh myopic corneal lenticule implantation as allogenic implant(-1.50D) that will be taken from myopic patients to implant on Pseudophakic patients with residual hypermetropia refraction (+1.0D) using VisuMax Femtosecond laser - Smile module surgery

Recruitment information / eligibility

• Status: Enrolling by invitation
• Enrollment: 130
• Est. completion date: June 1, 2024
• Est. primary completion date: June 1, 2018
• Accepts healthy volunteers: No
• Gender: All
• Age group: 20 Years to 45 Years

Eligibility

Inclusion Criteria:

• residual hypermetropic, myopic refraction on pseudophakic patients

• low visual acuity

Exclusion Criteria:

• active anterior segment pathologic features,

• previous corneal or anterior segment surgery,

• glaucoma,

• retinal detachment

Related Conditions & MeSH terms

• Hyperopia
• Myopia
• Pseudophakia
• Refractive Errors

Intervention

Procedure:
• Relex Smile
Procedure/Surgery: Relex Smile The residual myopic refraction on Pseudophakic patients after 6 months using Relex-Smile surgery by VisuMax femtosecond laser. The residual refractive power was min -0.75D.The optical zone (lenticule diameter) and cap diameter were 6.5 and 7.5 mm respectively. After dissection of both anterior and posterior planes, the lenticule was extracted through 120 degree superior 3.5 mm incision and marked with a sterile marker(ViscotMedster).
• Relex smile with fresh corneal lenticule implantation
VisuMax femtosecond laser performed flap-cut procedure with an energy cut index of 30 nJ (150nJ), spot and track spacing surface cut of 4.5 µm, side cut 2.0 µm were used to create an intrastromal pocket into the patient's cornea to receive the donor lenticule. The stromal pocket diameter was set 7.6 to 8.0 mm (1 mm larger than the optical zone of the donor lenticule) and cap thickness was set to 130 µm from corneal surface and a 4 mm superior incision. Hinge position flap was set at 90°, angle 50° and width 4 mm, side cut angle 90°. The pocket was dissected using a blunt spatula washed with normal saline. The lenticule was held with lenticule forceps and gently inserted into the pocket through the 4 mm superior incision. In pseudophakic patients with hyperopic astigmatism residual refraction, corneal topography-guided intrastromal fresh lenticular implantation should be performed according to the low K values.

Locations

Country	Name	City	State
Kosovo	Eye Hospital Pristina	Pristina

Sponsors (1)

Lead Sponsor	Collaborator
Eye Hospital Pristina Kosovo

Country where clinical trial is conducted

Kosovo, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Increase of visual acuity	Increase of visual acuity by reducing residual refractive errors (myopia, hyperopia) using ReLex Smile after Trifocal IOL implantation	6 months