Time-related Variation in Normal Automated Static Perimetry

Clinical evaluation of SITA: a new family of perimetric testing strategies

“…The reason for higher sensitivity with SITA is unknown. It may be explained by lessened intra-test fatigue due to the reduced test time for SITA, since a decrease in sensitivity with increased test duration has been reported in normal and glaucoma patients [8,16]. FAST-PAC, for example, which can perform threshold determination with shorter duration of testing time than Full Threshold, has demonstrated a lower mean deviation of 0.9±1.2 dB [3,4,13] or a higher mean threshold of 0.3 dB [12].…”

A Novel Distribution of Visual Field Test Points to Improve the Correlation between Structure–Function Measurements

“…Fewer locations tested would result in a shorter test and less fatigue and, consequently, more reliable performance. [19][20][21] Age, mean deviation, and RNFLT are described as mean 6 standard deviation, with range shown in parentheses. À1), (6, À3), (10, À1), (11, À3) 2 4 4 (10, À7), (1, À9), (À1, À5), (À9, À3) 3 11 4 (6, À12), (À2, À16), (À11, À12), (À15, À6) 4 7 4 (11, À15), (14, À10), (15, À15), (16, À10) 5 1 4 (19, À9), (21, À8), (20, À14), (23, À13) 6 1 4 (21, À4), (22, À2), (27, À9), (29, À4) 7 1 4 (22, 2), (21,4), (27,9), (29, 4) 8 1 4 (21,8), (19,9), (23,13), (20, 14) 9 8 4 (14, 10), (16,10), (14,15), (16, 15) 10 13 4 (5, 12), (À4, 13), (À7, 6), (À14, 10) 11 3 4 (À1, 4), (3,5), (6,4), (9, 3) 12 0 4 (0, 1), (4, 1), (8, 1), (11, 1) Total 52 48…”

Comparison of two fast strategies, SITA Fast and TOP, for the assessment of visual fields in glaucoma patients

“…The shortened test duration for TOP has implications for the quality of the test in terms of reducing the risk of fatigue artefact, which increases as test time increases [9,11,12,20]. Previous studies have found that fast strategy protocols consistently produce an increase in mean sensitivity values and a decrease in the mean defect [8,16,17,19].…”

“…However, the original fullthreshold tests for these perimeters were time consuming [13]. The prolonged test time was tiring for patients, increasing the likelihood of fatigue artefact [12], which artificially depresses the threshold values of the test [9,11,20]. Additionally, long tests are not practical in the clinical setting.…”