A Clinical Evaluation of the Next Generation Diagnostic Instrument (NGDI)

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT00347594

Enrollment

Registered

2006-07-04

Start date

2005-08-31

Completion date

2006-09-30

Last updated

2014-01-17

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

Conditions

Healthy

Keywords

Corneal surface topography, Ocular aberrations

Brief summary

The purpose of this study is to measure the aberrations, corneal surface topography and pachymetry of normal human eyes with the NGDI.

Interventions

DEVICENext Generation Diagnostic Instrument (NGDI)

Measurement of the aberrations, corneal surface topography, and pachymetry of normal human eyes

DEVICEZyoptix Diagnostic Workstation (ZDW)

Measurement of the aberrations, corneal surface topography, and pachymetry of normal human eyes

Study design

Allocation

NON_RANDOMIZED

Intervention model

PARALLEL

Primary purpose

DIAGNOSTIC

Masking

NONE

Eligibility

Sex/Gender

ALL

Age

21 Years to 75 Years

Healthy volunteers

Yes

Inclusion criteria

* +10.00D to -20.00D of absolute spherical ametropia * Must be part of the Bausch & Lomb research clinic * Snellen visual acuity must be correctable to 20/25

Exclusion criteria

* No more than -6.00D of refractive astigmatism

Design outcomes

Primary

Measure	Time frame
Measurement of aberrations with the NGDI and the Zywave II.	Single visit

Secondary

Measure	Time frame
Measurement of corneal topography and pachymetry with the NGDI and the Orbscan IIz.	Single visit

Countries

United States

Outcome results

None listed

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