The Effect of Myopic Optical Defocus on the Humphrey Matrix 30-2 Test

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT00638430

Enrollment

Registered

2008-03-19

Start date

2007-03-31

Completion date

2008-03-31

Last updated

2008-03-19

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

Conditions

Myopia

Keywords

myopia, Humphery Matrix 30-2 test

Brief summary

The purpose of this study is to examine the effect of the myopic optical defocus on the Humphrey Matrix 30-2 test.

Detailed description

The Humphery Matrix (Zeiss, Dublin, California, USA; in cooperation with Welch Allyn, Skaneateles, New York, USA), which is a recently developed version of FDT perimetry, showed more improved technology to detect early glaucomatous damage. The user's guide for the Humphrey Matrix (Humphrey® matrix visual field instrument user's guide. Zeiss, Dublin, California, USA; in cooperation with Welch Allyn, Skaneateles, New York, USA; 2003) suggests that myopic refractive errors more than -3.0 D need to be corrected before the 30-2 test. However, the proper correction of the optical defocus is not always easy because of a lack of trial frame. The purpose of the present study is twofold. At first, the influence of the low-grade myopia on the Humphery Matrix 30-2 test will be evaluated and compared to the effect of moderate-grade myopia. Secondly, the influence of myopic optical defocus and the glaucomatous visual field damage on the pattern deviation plot change according to the severity of glaucomatous visual field damage will be estimated.

Interventions

None listed

Study design

Observational model

CASE_ONLY

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

27 Years to 61 Years

Healthy volunteers

Yes

Inclusion criteria

* intra-ocular pressure 23 or higher * suspicious glaucomatous optic disc change * suspicious defect of retinal nerve fiber layer * or eyes with various degrees of glaucoma

Exclusion criteria

* a high myopic eye (SE more than -6.0 D) * moderate to severe cataract * evidence of diabetic or hypertensive retinopathy * macular disease * intra-ocular inflammation * history of intraocular surgery and any other ocular lesion that could have an influence on the perimetry result

Design outcomes

Primary

Measure	Time frame
mean defect	15 minutes

Countries

South Korea

Outcome results