CClinicalTrials.gg
CompletedNCT02847572Updated Jul 21, 2017

Assessment of Visual Performance Combining a Symfony IOL and a +3.25 Tecnis Multifocal IOL

An interventional study of Cataract Surgery in Cataract, sponsored by Crystal Clear Vision. Completed at 1 site in Canada. Open to participants aged 21 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2017-07-21.

Sponsored by Crystal Clear Vision · Not applicable, Interventional, and Treatment

Phase
Not applicable
Study type
Interventional
Enrollment
50
Allocation
Not applicable
Ages
21 Years and older
Sex
All
01

Study summary

This will be a single center, non comparison clinical trial. Fifty study patients will have the Symfony IOL implanted in their dominant eye and a +3,25D Tecnis Multifocal in their non-dominant eye. The investigators will be evaluated vision at distance, intermediate and near as well as assessing patient satisfaction and spectacle independence.

Read the detailed description

Each study patient will undergo the same routine cataract extraction procedure in each eye. In their dominant eye a Tecnis Symfony IOL will be implanted and in the non dominant eye, a Tecnis +3.25D Multifocal implanted. The surgeries will be within 2 days of each other. Every patient will receive same postoperative instructions and medications. The aim is to investigate the potential benefits of implanting two different IOL's to give the patient a wider range of near vision with decreased risk of haloing and glare to enable them to be less dependent on reading glasses

02

Conditions studied

  • Cataract

Browse trials for

03

In context

Cataract

1,701 studies on the registry are indexed under Cataract; 230 are open to participants now.

This study's enrollment of 50 is below the median of 80 across 1,155 interventional studies indexed under Cataract.

Browse Cataract studies →

Lead sponsor

This is the only study on the registry with Crystal Clear Vision as lead sponsor.

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

04

Who can participate

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

Inclusion criteria

  • good general health,
  • willing to comply with study instructions,
  • Visual potential of 20/30 or better,
  • less than 1.5D of corneal astigmatism,
  • normal macula,
  • clear lens or cataract,
  • pupil size greater than 3.5mm

Exclusion criteria

Exclusion Criteria:

  • known pathology to affect visual outcome,
  • amblyopia or strabismus,
  • pupil abnormalities,
  • zonule problems,
  • keratoconus,
  • no prior ocular surgery,use of medication that could affect vision,
  • uncontrolled systemic disease
05

Study design

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

Study arms

  • Other
    Surgery Patient

    All patients to be implanted bilaterally with a Tecnis Extended Range Lens in the Dominant eye and a Low Add Multifocal in the non dominant

    Procedure: Cataract Surgery

Interventions

  • ProcedureCataract Surgery

    All patients wil be having intraocular lens surgery

06

What researchers measure

Primary outcomes

  1. Visual Acuity

    Vision will be measured at distance, intermediate and near with and without correction.

    Time frame: 3 months

Secondary outcomes

  1. Patient Satisfaction

    Patients will fill in a Patient Satisfaction Questionnaire at all visits. Contrast sensitivity will also be measured

    Time frame: 3 months

07

Study locations

1 site
  • Crystal Clear Vision
    Toronto, Ontario M5R 2E3, Canada
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 21, 2017, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT02847572
Lead sponsor
Crystal Clear Vision
Collaborators
Abbott
Responsible party
Sponsor
First posted
Jul 28, 2016
Start date
Jan 2016
Primary completion
Dec 2016
Completion
Dec 2016
Last update
Jul 21, 2017

Study contacts

Sondra Black, OD
study chair · Crystal Clear Vision

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Jul 2017. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion