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Completed

NCT Number: NCT03054649

ClarVista HARMONI Toric Trial With Intraoperative Exchange

The purpose of this study was to demonstrate the safety and effectiveness of the HARMONI® Modular Intraocular Lens System with a toric optic in subjects with pre-existing corneal astigmatism in need of cataract surgery.

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Key information

Conditions

Cataract Aphakia Astigmatism Corneal Astigmatism Eye Diseases Lens Diseases Refractive Errors

Age range

22 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

ClarVista Investigative Site, Tijuana, Estado de Baja California, Mexico

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About this study

Subjects were implanted with the HARMONI® Modular Intraocular Lens System (HMIOL). The eye with the higher corneal astigmatism (study eye) was assigned to Cohort 1 and received the HARMONI® Modular Intraocular Lens System with a toric optic. The fellow eye was assigned to Cohort 2 and received the HARMONI® Modular Intraocular Lens System with a non-toric optic during primary implantation, which was replaced with the appropriate optic power (toric or non-toric) during an intraoperative exchange (IOE) procedure. A total of 7 study visits were planned, including a preoperative visit, operative visits for each eye, and 4 follow-up visits at 1 day, 1 week, 1 month, and 3 months postoperative. The total duration of participation for each subject was up to 6 months, which included a Day -90 to Day -0 preoperative period.

Alcon Research, LLC, acquired ClarVista Medical in 2017. This study was designed and conducted by ClarVista Medical, Inc. The study results were collected, analyzed, and provided by ClarVista Medical, Inc. to Alcon Research, LLC.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Key Inclusion Criteria

  • Willing and able to return for scheduled treatment and follow-up examinations for up to 6 month study duration.
  • Planned removal of visually significant bilateral cataracts.
  • Pre-existing corneal astigmatism in at least 1 eye.
  • Willing to discontinue contact lens wear for the duration of the study.
  • Best Corrected Visual Acuity (BCVA) projected to be 0.2 logarithm Minimum Angle of Resolution (logMAR) or lower.
  • Visual symptoms related to cataracts.

Key Exclusion Criteria

  • History of any intraocular or corneal surgery in either eye (including refractive).
  • Pregnant or lactating.
  • History of any clinically significant retinal pathology or ocular diagnosis in either eye that could alter or limit final postoperative visual prognosis.
  • History of any ocular condition which could affect the stability of the intraocular lens (IOL) in either eye.
  • Uncontrolled glaucoma in either eye (per Investigator judgement).
  • Severe dry eye that, in the opinion of the investigator, would impair the ability to obtain reliable study measurements

Treatment and study plan

HARMONI® Modular Intraocular Lens System

Device

Two-component system consisting of a base and a separate optic that allows for an intraoperative exchange of the optic only without direct manipulation of the capsular bag

Other names: HMIOL

Intraoperative optic exchange

Procedure

Removal of one optic and replacement with another during cataract surgery for the purpose of improving refractive outcomes

Other names: IOE

Primary outcomes

  1. Mean Manifest Refraction Cylinder (MRCYL) for Eyes Implanted With HMTIOL

    Time frame: Month 1 postoperative, Month 3 postoperative

    A manifest refraction (manual vision test) was conducted using letter charts and a phoropter. Manifest refraction cylinder is the amount of added correction needed to compensate for any astigmatism that may be present. MRCYL was measured in diopters and reported as a negative number, with a less negative number indicating a lesser amount of added correction. No formal statistical hypothesis testing was planned.

  2. Mean Manifest Refraction Cylinder (MRCYL) Prediction Error (PE) for Eyes Implanted With HMTIOL

    Time frame: Month 1 postoperative, Month 3 postoperative

    A manifest refraction (manual vision test) was conducted using letter charts and a phoropter. Manifest refraction cylinder is the amount of power needed to correct any astigmatism that may be present. MRCYL was measured in diopters and reported as a negative number. MRCYL PE was calculated as postoperative MRCYL adjusted to 6 meters minus MRCYL target residual refractive error (TRRE), with a lower absolute value indicating a more accurate cylinder power calculation. No formal statistical hypothesis testing was planned.

  3. Mean Reduction in Cylinder Power for Eyes Implanted With HMTIOL

    Time frame: Baseline (Day 0 preoperative), Month 3 postoperative

    A manifest refraction (manual vision test) was conducted using letter charts and a phoropter. Manifest refraction cylinder is the amount of power needed to correct any astigmatism that may be present. MRCYL was measured in diopters and reported as a negative number. Cylinder power reduction was calculated as the absolute preoperative magnitude of corneal cylinder (K) minus the absolute postoperative magnitude of MRCYL at the corneal plane. No formal statistical hypothesis testing was planned.

  4. Mean Percent Reduction in Cylinder Power for Eyes Implanted With HMTIOL

    Time frame: Baseline (Day 0 preoperative), Month 3 postoperative

    A manifest refraction (manual vision test) was conducted using letter charts and a phoropter. Manifest refraction cylinder is the amount of power needed to correct any astigmatism that may be present. MRCYL was measured in diopters and reported as a negative number. Cylinder power reduction was calculated as the absolute preoperative magnitude of corneal cylinder (K) minus the absolute postoperative magnitude of MRCYL at the corneal plane. Therefore, the cylindrical power percent reduction was the cylinder power reduction divided by the absolute value of preoperative magnitude of corneal cylinder (K) × 100. A higher number (greater percent reduction) indicates better astigmatism correction by the toric IOL. No formal statistical hypothesis testing was planned.

  5. Mean Manifest Refraction Spherical Equivalent (MRSE) Prediction Error (PE)

    Time frame: Month 3 postoperative

    A manifest refraction (manual vision test) was conducted using letter charts and a phoropter. The manifest refraction spherical equivalent (MRSE) was calculated as follows: sphere + 1/2 cylinder, and measured in diopters (D). MRSE PE was calculated as postoperative MRSE adjusted to 6 meters minus MRSE target residual refractive error (TRRE). The lower the absolute number, the more accurate the IOL power calculation is. No formal statistical hypothesis testing was planned.

  6. Mean Absolute Rotation of IOL Meridian

    Time frame: Baseline (Day 0 operative), Day 1 postoperative, Week 1 postoperative, Month 1 postoperative, Month 3 postoperative

    IOL orientation was measured with slit-lamp photography. IOL rotation was defined as the difference between axis of IOL orientation on the day of surgery and the subsequent postoperative visit. IOL rotation was measured in degrees, with a lower number indicating less rotation. No formal statistical hypothesis testing was planned.

  7. Number of Eyes With Absolute Rotation of IOL Meridian by Visit - Cohort 1

    Time frame: Baseline (Day 0 operative), Day 1 postoperative, Week 1 postoperative, Month 1 postoperative, Month 3 postoperative

    IOL orientation was measured with slit-lamp photography. IOL rotation was defined as the difference between axis of IOL orientation on the day of surgery and the subsequent postoperative visit. IOL rotation was measured in degrees and is reported categorically. No formal statistical hypothesis testing was planned.

  8. Number of Eyes With Absolute Rotation of IOL Meridian by Visit - Cohort 2

    Time frame: Baseline (Day 0 operative), Day 1 postoperative, Week 1 postoperative, Month 1 postoperative, Month 3 postoperative

    IOL orientation was measured with slit-lamp photography. IOL rotation was defined as the difference between axis of IOL orientation on the day of surgery and the subsequent postoperative visit. IOL rotation was measured in degrees and is reported categorically. No formal statistical hypothesis testing was planned.

  9. Percentage of Eyes With Best Corrected Distance Visual Acuity (BCDVA) by Visit - Cohort 1

    Time frame: Baseline (Day 0 operative), Week 1 postoperative, Month 1 postoperative, Month 3 postoperative

    Visual Acuity of the eye was tested while reading charts at 20-foot equivalent distance from the participant with the correction obtained from manifest refraction testing. BCDVA is reported categorically using the Snellen fraction, which compares the participant's result to the result expected from a 'normal' visual system. The numerator represents the distance between the participant and the chart, and the denominator represents the distance at which a person with 'normal' vision would be able to discern the same letter size. 20/20 is considered to be 'normal' vision, whereas visual acuity of 20/40 means the participant is able to read a certain size letter 20 feet away that a person with 'normal' vision would be able to read from 40 feet away. A larger denominator, therefore, indicates a lower visual acuity. No formal statistical hypothesis testing was planned.

  10. Percentage of Eyes With Best Corrected Distance Visual Acuity (BCDVA) by Visit - Cohort 2

    Time frame: Baseline (Day 0 operative), Week 1 postoperative, Month 1 postoperative, Month 3 postoperative

    Visual Acuity of the eye was tested while reading charts at 20-foot equivalent distance from the participant with the correction obtained from manifest refraction testing. UCDVA is reported categorically using the Snellen fraction, which compares the participant's result to the result expected from a 'normal' visual system. The numerator represents the distance between the participant and the chart, and the denominator represents the distance at which a person with 'normal' vision would be able to discern the same letter size. 20/20 is considered to be 'normal' vision, whereas visual acuity of 20/40 means the participant is able to read a certain size letter 20 feet away that a person with 'normal' vision would be able to read from 40 feet away. A larger denominator, therefore, indicates a lower visual acuity. No formal statistical hypothesis testing was planned.

  11. Percentage of Eyes With Uncorrected Distance Visual Acuity (UCDVA) by Visit - Cohort 1

    Time frame: Baseline (Day 0 operative), Day 1 postoperative, Week 1 postoperative, Month 1 postoperative, Month 3 postoperative

    Visual Acuity of the eye was tested while reading charts at 20-foot equivalent distance from the participant with an optical infinity adjustment of +0.25 diopter (D). The Snellen fraction compares the participant's result to the result expected from a 'normal' visual system. The numerator represents the distance between the participant and the chart, and the denominator represents the distance at which a person with 'normal' vision would be able to discern the same letter size. 20/20 is considered to be 'normal' vision, whereas visual acuity of 20/40 means the participant is able to read a certain size letter 20 feet away that a person with 'normal' vision would be able to read from 40 feet away. A larger denominator, therefore, indicates a lower visual acuity. No formal statistical hypothesis testing was planned.

  12. Percentage of Eyes With Uncorrected Distance Visual Acuity (UCDVA) by Visit - Cohort 2

    Time frame: Baseline (Day 0 operative), Day 1 postoperative, Week 1 postoperative, Month 1 postoperative, Month 3 postoperative

    Visual Acuity of the eye was tested while reading charts at 20-foot equivalent distance from the participant with an optical infinity adjustment of +0.25 diopter (D). The Snellen fraction compares the participant's result to the result expected from a 'normal' visual system. The numerator represents the distance between the participant and the chart, and the denominator represents the distance at which a person with 'normal' vision would be able to discern the same letter size. 20/20 is considered to be 'normal' vision, whereas visual acuity of 20/40 means the participant is able to read a certain size letter 20 feet away that a person with 'normal' vision would be able to read from 40 feet away. A larger denominator, therefore, indicates a lower visual acuity. No formal statistical hypothesis testing was planned.

  13. Number of Eyes With Preservation of BCDVA at Month 1 and Month 3

    Time frame: Week 1 postoperative, Month 1 postoperative, Month 3 postoperative

    Preservation of BCDVA was defined in terms of lines lost when reading the ETDRS chart at each visit compared to the prior best-achieved BCDVA. Loss of < 1 line included subjects with less than a 1 line loss, no change or improvement in BCDVA. No formal statistical hypothesis testing was planned.

  14. Number of Ocular Adverse Events Through Month 3

    Time frame: Up to Month 3 postoperative

    Ocular adverse events were identified as outlined in ISO 11979-2014 Annex B. No formal statistical hypothesis testing was planned.

  15. Number of Device Deficiencies Post Implantation

    Time frame: Up to Month 3 postoperative

    A Device Deficiency (DD) was defined as a failure of the device to meet its performance specifications or expectations, or otherwise not perform as intended. This could include either a malfunction or damage to the device or any part thereof, regardless of the source of malfunction or damage, including user error, and regardless of the presence of injury (or lack thereof) to subject, user, or bystander. No formal statistical hypothesis testing was planned.

  16. Number of Secondary Surgical Interventions, Other Than Intraroperative Optic Exchange and Rotational Adjustment of the Toric Optic in Cohort 2

    Time frame: Up to Month 3 postoperative

    A secondary surgical intervention (SSI) was defined as a surgical procedure that occurred after primary implantation and was conducted for the purpose of resolving residual refractive error (RRE) and optimizing visual outcomes. No formal statistical hypothesis testing was planned.

  17. Percent Change in Endothelial Cell Count (ECC) at Month 3

    Time frame: Baseline (preoperative), Month 3 postoperative

    High quality images of the corneal endothelium (the single layer of cells on the inner surface of the cornea) were taken at the investigative site and sent to an independent central reading center for evaluation. A negative percent change value may indicate a decrease in the ability of the endothelium to maintain its primary function. No formal statistical hypothesis testing was planned.

Sponsors and collaborators

Lead sponsor

ClarVista Medical

Industry

Registry information

Official study title

A Prospective, Multicenter Study to Evaluate the Safety and Performance of the Exchangeable ClarVista HARMONI Modular Toric Intraocular Lens System for the Treatment of Pre-Existing Corneal Astigmatism and Aphakia Following Cataract Surgery

Important dates

Study start
2016
Primary completion
2017
Study completion
2017
First posted
Feb 15, 2017
Registry last updated
Jun 22, 2020

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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