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CompletedNCT02430428Updated Jan 27, 2021

Correction of Myopia Wtih or Without Astigmatism Using the VisuMax™ Femtosecond Laser

An interventional study of Carl Zeiss Meditec VisuMax Femtosecond Laser in Myopia and Astigmatism, sponsored by Carl Zeiss Meditec, Inc.. Completed at 5 sites in United States. Open to participants aged 22 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2021-01-27.

Sponsored by Carl Zeiss Meditec, Inc. · Not applicable, Interventional, and Treatment

Phase
Not applicable
Study type
Interventional
Enrollment
357
Allocation
Not applicable
Ages
22 Years and older
Sex
All
01

Study summary

The objective of this clinical trial is to evaluate the safety and effectiveness of the Carl Zeiss Meditec VisuMax™ Femtosecond Laser lenticule removal procedure for the reduction or elimination of myopia from ≥ -1.00 D to ≤ -10.00 D with ≤ -3.00 D cylinder (myopia with or without astigmatism) and MRSE ≤ -11.50 D.

Read the detailed description

This is a prospective multi-center clinical trial in which a maximum of 360 eyes of 360 consecutive subjects will be enrolled and treated with the VisuMax™ Femtosecond Laser. The study will be conducted at up to 8 clinical sites.

Subjects will be screened for eligibility, and informed consent will be obtained from those who meet screening criteria and are interested in participating in the study. Eligible subjects will be examined preoperatively to obtain a medical history and to establish a baseline ocular condition. Baseline and postoperative measurements will include manifest refraction, cycloplegic refraction, distance visual acuity (best corrected and uncorrected), slit-lamp examination, fundus examination, corneal topography, central corneal pachymetry, mesopic pupil measurement, wavefront analysis, mesopic contrast sensitivity, and intraocular pressure (IOP).

Only eyes with astigmatism ≥ -0.75 D to ≤ -3.00 D targeted for the full distance manifest spherocylindrical refraction, or eye(s) with astigmatism \< -0.75 D targeted for the full distance manifest sphere-only refraction, will be enrolled into the study.

Subjects must have astigmatism ≤ -3.00 D in the eye to be treated. Eyes with astigmatism ≥ -0.75 D to ≤ -3.00 D will receive a spherocylindrical treatment. Eyes with astigmatism \< -0.75 D will receive a sphere-only treatment.

Operative eyes with astigmatism ≥ -0.75 D to ≤ -3.00 D must be targeted for the full distance manifest spherocylindrical refraction. Operative eye(s) with astigmatism \< -0.75 D must be targeted for the full distance manifest sphere-only refraction.

Monovision treatments and retreatments of the study eye will not be allowed during the course of the study. Bilateral investigational treatments will not be allowed during the study.

Safety and effectiveness criteria from the American National Standard for Ophthalmics (ANSI Z80.11-2012) - Laser Systems for Corneal Reshaping will be utilized in the evaluation of the VisuMax Femtosecond Laser.

02

Conditions studied

  • Myopia
  • Astigmatism

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03

In context

Myopia

984 studies on the registry are indexed under Myopia; 210 are open to participants now.

This study's enrollment of 357 is above the median of 80 across 783 interventional studies indexed under Myopia.

Browse Myopia studies →

Lead sponsor

Carl Zeiss Meditec, Inc. is the lead sponsor of 17 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
22 Years and older
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  1. Male and female subjects age 22 years of age and older;
  2. Myopia from ≥ -1.00 D to ≤ -10.00 D with ≤ -3.00 D cylinder and MRSE ≤ -11.50 D in the eye to be treated;
  3. A stable refraction for the past year, as demonstrated by a change in MRSE of ≤ 0.50 D in the eye to be treated;
  4. A difference between cycloplegic and manifest refractions of \< 0.75 D spherical equivalent in the eye to be treated;
  5. UCVA worse than 20/40 in the eye to be treated;
  6. BSCVA at least 20/20 in the eye to be treated;
  7. Discontinue use of contact lenses for at least 2 weeks (for hard lenses) or 3 days (for soft lenses) prior to the preoperative examination, and through the day of surgery;
  8. All contact lens wearers must demonstrate a stable refraction (within ±0.5 D), as determined by MRSE, on two consecutive examinations at least 1 week apart, in the eye to be treated;
  9. Central corneal thickness of at least 500 microns in the eye to be treated;
  10. Willing and able to return for scheduled follow-up examinations;
  11. Able to provide written informed consent and follow study instructions in English

Exclusion criteria

Exclusion Criteria:

  1. Mesopic pupil diameter >8.0 mm;
  2. Cylinder > -3.00 D;
  3. Treatment depth is less than 250 microns from the corneal endothelium;
  4. Eye to be treated is targeted for monovision;
  5. Fellow eye has BSCVA worse than 20/40;
  6. Keratometry readings via Sim-K values less than 40.00 D;
  7. Abnormal corneal topographic findings, e.g. keratoconus, pellucid marginal degeneration in either eye;
  8. History of or current anterior segment pathology, including cataracts in the eye to be treated;
  9. Clinically significant dry eye syndrome unresolved by treatment in either eye;
  10. Residual, recurrent, active ocular or uncontrolled eyelid disease, corneal scars or other corneal abnormality such as recurrent corneal erosion or severe basement membrane disease in the eye to be treated;
  11. Ophthalmoscopic signs of progressive or unstable myopia or keratoconus (or keratoconus suspect) in either eye;
  12. Irregular or unstable (distorted/not clear) corneal mires on central keratometry images in either eye;
  13. History of ocular herpes zoster or herpes simplex keratitis;
  14. Deep orbits, strong blink, anxiety, pterygium, or any other finding suggesting difficulty in achieving or maintaining suction;
  15. Difficulty following directions or unable to fixate;
  16. Previous intraocular or corneal surgery of any kind in the eye to be treated, including any type of surgery for either refractive or therapeutic purposes;
  17. History of steroid-responsive rise in intraocular pressure, glaucoma, or preoperative IOP > 21 mmHg in either eye;
  18. History of diabetes, diagnosed autoimmune disease, connective tissue disease or clinically significant atopic syndrome;
  19. Immunocompromised or requires chronic systemic corticosteroids or other immunosuppresive therapy that may affect wound healing;
  20. History of known sensitivity to planned study medications;
  21. Participating in any other ophthalmic drug or device clinical trial during the time of this clinical investigation;
  22. Pregnant, lactating, or of child-bearing potential and not practicing a medically approved method of birth control.
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
357 participants (actual)

Study arms

  • Experimental
    VisuMax lenticule removal

    VisuMax femtosecond laser sphere-only or spherocylindrical treatment

    Device: Carl Zeiss Meditec VisuMax Femtosecond Laser

Interventions

  • DeviceCarl Zeiss Meditec VisuMax Femtosecond Laser

    VisuMax femtosecond laser sphere-only or spherocylindrical treatment

06

What researchers measure

Primary outcomes

  1. Number of subjects with MRSE within ± 1.00 D and ± 0.50 D

    Predictability: Decrease in manifest refraction spherical equivalent (MRSE) to within ± 1.00 D and ± 0.50 D of the intended refractive outcome at the point at which stability is first reached

    Time frame: 1 Year

  2. Improvement in UCVA following treatment

    The uncorrected visual acuity of 20/40 or better for eyes targeted for emmetropia at the postoperative interval at which stability has been established

    Time frame: 1 Year

  3. Preservation of Best-Spectacle Corrected Visual Acuity (BSCVA)

    Preservation of Best-Spectacle Corrected Visual Acuity (BSCVA): 1. In eyes with preoperative BSCVA 20/20 or better, the percentage of eyes with BSCVA worse than 20/40 at the postoperative interval at which stability has been established 2. The percentage of eyes with BCVA loss ≥ 2 lines

    Time frame: 1 Year

  4. Number of subjects with induced MRCyl > 2.00 D

    Induced manifest refractive astigmatism: The percentage of eyes treated for spherical myopia only with induced manifest refractive cylinder of \> 2.00 D at the postoperative interval at which stability has been established

    Time frame: 1 Year

  5. Incidence of Adverse Events

    Incidence of Adverse Events: The rate of each type of adverse event will be summarized

    Time frame: 1 Year

  6. Change in Contrast Sensitivity

    Contrast Sensitivity: Mean of "within-eye" loss of contrast sensitivity from baseline to 12 months will be provided with the 1-sided 95% confidence interval for each spatial frequency. Percentage of eyes showing ≥ 0.3 log units loss at two or more spatial frequencies at the last available postoperative visit will be calculated.

    Time frame: 1 Year

Secondary outcomes

  1. Patient Symptoms

    Patient Symptoms: Will be considered as a secondary safety variable and will be evaluated via a subject questionnaire.

    Time frame: 1 Year

07

Study locations

5 sites
  • Dishler Laser Institute
    Greenwood Village, Colorado 80111, United States
  • Discover Vision Centers
    Leawood, Kansas 66211, United States
  • Vance Thompson Vision
    Sioux Falls, South Dakota 57108, United States
  • Slade and Baker Vision Center
    Houston, Texas 77027, United States
  • Davis Duehr Dean
    Madison, Wisconsin 53715, United States
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jan 27, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT02430428
Lead sponsor
Carl Zeiss Meditec, Inc.
Responsible party
Sponsor
First posted
Apr 30, 2015
Start date
Mar 2015
Primary completion
Oct 2017
Completion
Oct 2017
Last update
Jan 27, 2021

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Jan 2021. You cannot join it, but the record below documents what was studied.

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