The Effect of Myopic Optical Defocus on the Humphrey Matrix 30-2 Test
The purpose of this study is to examine the effect of the myopic optical defocus on the Humphrey Matrix 30-2 test.
|Study Design:||Observational Model: Case-Only
Time Perspective: Prospective
|Official Title:||The Effect of Myopic Optical Defocus on the Humphrey Matrix 30-2 Test|
- mean defect [ Time Frame: 15 minutes ] [ Designated as safety issue: No ]
|Study Start Date:||March 2007|
|Study Completion Date:||March 2008|
|Primary Completion Date:||October 2007 (Final data collection date for primary outcome measure)|
low myopic group
moderate myopic group
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.
Please refer to this study by its ClinicalTrials.gov identifier: NCT00638430
|Korea, Republic of|
|Samsung Medical Center|
|Seoul, Korea, Republic of, 130-710|
|Study Chair:||Changwon Kee, M.D.||Department of Ophthalmology, Samsung Medical Center,|