Comprehensive Evaluation of Visual Function

Status

UNKNOWN

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT00894192

Enrollment

300

Registered

2009-05-06

Start date

2009-02-28

Completion date

2009-12-31

Last updated

2009-05-06

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Visual Function

Keywords

This study tests functional ability of patients with refractive error or normal vision while using different types of eyeglasses.

Brief summary

The purpose of this study is to assess the level of visual functioning in patients with various eye conditions while wearing different types of eyeglasses.

Detailed description

The purpose of the research is to study the level of visual functioning in individuals with various eye conditions when using different types of eyeglass lenses. Therefore, the goal of this study is to determine factors that may account for variability in the visual functioning of individuals with a range of refractive errors and their ability to perform everyday activities when equipped with different types of lenses. We hypothesize that the subjects will perform visual tasks of function better when using iZon™ Wavefront-Guided Glasses than with conventional glasses. This hypothesis is based upon the glasses yielding better visual acuity and because the design of the glasses reduces the effects of glare. This research is important so that alternate treatments and vision correction may be implemented which will have a more beneficial impact on those with refractive errors and visual impairment.

Interventions

DEVICEIzon Wavefront-guided lenses

Subjects will use prescribed eyeglasses for one week. Their visual functioning will be tested at the end of the week.

DEVICEConventional lenses

We will test the subjects with these lenses after they have worn them for one week. Same procedures will be followed as with the other lenses.

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

TREATMENT

Masking

TRIPLE (Subject, Caregiver, Investigator)

Eligibility

Sex/Gender

ALL

Age

18 Years to 35 Years

Healthy volunteers

Yes

Inclusion criteria

* Have normal vision * Are far-sighted or near-sighted * Have no eye diseases Subjects aged 18 and over, who have refractive errors ranging from +5.0 to -5.0 and/or who have eye disease will be included in the study.

Design outcomes

Primary

Measure	Time frame
Visual Acuity, and Contrast Sensitivity	Once a week

Countries

United States

Contacts

Primary ContactSamar Suleman, BA

samar.suleman@chicagolighthouse.org312-447-3234

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026