Ординатура / Офтальмология / Английские материалы / A Visual Field Evaluation with Automated Devices 2nd edition_Reddy_2006

VISUAL FIELD LOSS IN GLAUCOMA 131

SINGLE FIELD ANALYSIS PRINTOUT IN A CASE OF

CATARACT—CASE II

P. Venkata Rao Right eye field Selection of the test : 30-2 SITA Standard Reliability : Good

A case of uniform generalized field defect

1. Generalized depression in the total deviation probability plot and almost normal pattern deviation probability plot.

2. PSD : 2.02 dB

3. MD : -7.41 dB P < 0.5%

VISUAL FIELD LOSS IN GLAUCOMA 133

THE FEATURES IN SINGLE FIELD ANALYSIS PRINTOUT IN CASES OF CATARACT, CATARACT + GLAUCOMA, ADVANCED STAGE OF GLAUCOMA

FOLLOW-UP VISUAL FIELD EXAMINATION 135

OVERVIEW PRINTOUT

The main advantage of the overview printout is to present all the single field analysis examinations of up to 16 tests on a single page. The tests are automatically printed in a chronological order. So it is easier to review the results of a series of tests without much difficulty. The overview printout consists of all the data that is present in the single field analysis printout except for the visual acuity and refractive error correction. The most important thing is to know that the overview printout does not give any additional information over the single field analysis printout. (All the data of the single field analysis printout is printed in a limited space in the overview printout format). The overview printouts must be analyzed for change by the use of experienced judgment without statistical assistance.

The patient’s name, the eye tested, date of birth, the selection of the test will appear on the top of the test.

The overview printout presents the results of each test in four plots—gray scale, RAWdata, total deviation probability plot and pattern deviation probability plot. The foveal threshold, the reliability parameters and global indices are also printed at the bottom of each test. The main advantage of overview printout is to glance the number of tests of chronological order on a single paper so that it is easy to compare the tests to one another. The most practical point one should remember is that results from 30-2 and 24-2 may be presented in the same printout. The STATPAC does not combine 10-2 with any other test patterns. The legend to the probability symbols appear at the bottom of the printout.

The refractive error correction and visual acuity will not be mentioned in the overview printout.

FOLLOW-UP VISUAL FIELD EXAMINATION 137

CHANGE ANALYSIS PRINTOUT

Like the over view printout, the change analysis printout shows more than 10 test results on one sheet. The STATPAC produces analytical summary of changes in the patient’s visual field from the time of earliest test included in the summary to the time of the most recent test included. The change analysis printout consists of three components: (i) a box plot with its relation to the dB scale, (ii) the summary of the global indices, and (iii) linear regression analysis of mean deviation. The indices are the same four presented in the single field analysis. But this time, they are plotted overtime to indicate the changes in the patient’s visual field.

Box plot

Global indices component

Linear regression analysis of Mean Deviation