Myopia Clinical Trial
Official title:
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.
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.
;
Observational Model: Case-Only, Time Perspective: Prospective
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