Use of the VisuMax Femtosecond Laser Lenticule Removal Procedure for the Correction of Hyperopia
- Conditions
- Hypermetropia
- Interventions
- Procedure: ReLEx SMILE
- Registration Number
- NCT03431571
- Lead Sponsor
- Carl Zeiss Meditec AG
- Brief Summary
The correction of farsightedness using ReLEx SMILE for hyperopia is focus of this investigation. The objective is to evaluate the safety and effectiveness.
- Detailed Description
The VisuMax laser keratome is an ophthalmic surgical femtosecond laser intended for use in patients requiring corneal incisions. The cutting action of the VisuMax laser keratome is achieved through precise individual micro-photodisruptions of tissue, created by tightly focused, ultra-short pulses, delivered through a disposable applanation lens while fixating the eye under a low vacuum. ReLEx SMILE combines state-of-the-art femtosecond laser technology of the VisuMax with high-precision lenticule extraction to provide minimally invasive refractive correction. It is distinguished by its flapless, minimally invasive laser correction. A refractive lenticule is created in the intact cornea, but removed via a small incision. The changed form of the cornea corrects the refraction error. ReLEx SMILE for myopia is a well-established treatment with extensive supporting published evidence for efficacy and safety. It is CE marked and available since 2011; more than 1 Million procedures have been performed worldwide. The correction of farsightedness using ReLEx SMILE for hyperopia is focus of this investigation and is therefore not yet CE marked.
Recruitment & Eligibility
- Status
- UNKNOWN
- Sex
- All
- Target Recruitment
- 374
- Normal corneal topography;
- Predicted post-operative keratometry ≤51 D;
- Contact lens wearers must stop wearing their contact lenses before baseline measurements according to local requirements of the clinic;
- Patients should be able to understand the patient information and willing to sign an informed consent;
- Patients should be willing to comply with all follow-up visits and the respective examinations;
- Patients with hyperopia or hyperopia with astigmatism (attempted correction: sphere up to +6.00D, cylinder up to 5.00D and maximum hyperopic meridian up to +7.00D);
- The corrected distance visual acuity should be 20/25 or better in each eye pre-operatively;
- A difference between cycloplegic and manifest refractions of ≤1.00 D spherical equivalent in the eye to be treated;
- The patients presenting at least one of the characteristics as described for exclusion criteria in the documentation set of the VisuMax laser keratome ReLEx SMILE option.
- Mixed astigmatism
- Any impaired person (minors, pregnant or breast feeding women or persons incapable of giving consent) are definitely excluded from the study.
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- SINGLE_GROUP
- Arm && Interventions
Group Intervention Description Single arm ReLEx SMILE ReLEx SMILE treatment can be done binocular or monocular, no masking and randomization used, no control group
- Primary Outcome Measures
Name Time Method Corrected Distance Visual Acuity (CDVA) 12 months CDVA in logMar
- Secondary Outcome Measures
Name Time Method side effects 12 months distribution in percent
patient satisfaction (Quality of Vision Questionnaire) 12 months Mean +/- standard deviation
manifest refractive astigmatism 12 months Astigmatism in diopters \[D\]
contrast sensitivity 12 months contrast sensitivities for all spatial frequencies (3, 6, 12 and 18 cpd) in logMar
spherical equivalent (SE) 12 months SE in diopters \[D\]
Trial Locations
- Locations (8)
Gemini Eye Clinic
🇨🇿Zlín, Czechia
University Medical Center Shanghai
🇨🇳Shanghai, China
Tianjin Eye Hospital, Heping District
🇨🇳Tianjin, China
Medical Center Nethradhama Superspeciality Eye Hospital
🇮🇳Bangalore, India
London Vision Clinic
🇬🇧London, United Kingdom
University Medical Center Universitätsklinikum Gießen Marburg
🇩🇪Marburg, Germany
University Medical Center CHRU Brest
🇫🇷Brest, France
Medical Center Heliosklinikum
🇩🇪Erfurt, Germany