Learning effect in visual field testing of healthy subjects using Humphrey Matrix frequency doubling technology perimetry

Visual fields in the pediatric population are an essential part of the eye exam that remain challenging to even the most experienced clinicians. Becoming educated in the multiple ways a child's visual field can be tested regardless of age and cognitive and physical abilities will allow the clinician to gain better insight into the child's function and in some cases, allow the clinician to identify pathological or neurological anomalies in the visual pathway. Gross visual field or functional visual field extent can be estimated by tests such as confrontation visual field testing, finger counting field testing, and white sphere kinetic perimetry. For threshold measurements of a child's visual fields, the Goldmann perimeter, or the more advanced computerized tests such as the Humphrey perimeter, Octopus perimeter, or frequency doubling technology perimeter can be used. Modifications can be made to certain tests to better suit the child's cognitive and physical abilities. The chapter covers different methods of visual field testing specific for the pediatric population.

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Reliability and diagnostic significance of frequency doubling visual field testing

Acta Ophthalmologica ◽

10.1111/j.1755-3768.2008.505.x ◽

2008 ◽

Vol 86 ◽

pp. 0-0

Author(s):

H SAEDON ◽

S HAMADA ◽

M TAHHAN

Keyword(s):

Visual Field ◽

Frequency Doubling ◽

Field Testing ◽

Visual Field Testing ◽

Diagnostic Significance

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Alzheimer’s Disease: Screening Biomarkers Using Frequency Doubling Technology Visual Field

ISRN Neurology ◽

10.1155/2013/989583 ◽

2013 ◽

Vol 2013 ◽

pp. 1-9 ◽

Cited By ~ 10

Author(s):

Denise A. Valenti

Keyword(s):

Alzheimer’S Disease ◽

Alzheimer's Disease ◽

Visual Field ◽

Visual System ◽

Frequency Doubling ◽

Field Testing ◽

Retinal Diseases ◽

Screening Criteria ◽

Normative Database ◽

Frequency Doubling Technology

This study was to investigate the feasibility of frequency doubling technology (FDT) visual field testing in Alzheimer’s disease (AD) in order to identify early biomarkers of AD in patients already diagnosed with AD and compare the findings to participants not having Alzheimer’s disease. This biomarker would be useful in a battery of tests for the early identification of those with AD. It was not the intent to correlate the visual system biomarker with severity of disease, but to determine if the biomarker was present in pass or fail screening criteria. The study showed with very strong significance that the FDT can identify biomarkers of those with AD compared to an age-matched population that does not have AD. FDT is a simple test to take and administer and has been used to screen for eye and retinal diseases such as glaucoma, retinal macular degeneration, and diabetic retinopathy. The results obtained in the FDT readout are analyzed and compared to the age normative database within the system. The FDT ability to screen for AD biomarker in the visual system was significant in those with AD compared to the controls, and the deficits were not related to any ocular pathology.

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Evaluation of Two Humphrey Perimetry Programs: Full Threshold and SITA Standard Testing Strategy for Learning Effect

European Journal of Ophthalmology ◽

10.1177/112067210501500205 ◽

2005 ◽

Vol 15 (2) ◽

pp. 209-212 ◽

Cited By ~ 5

Author(s):

Ö. Yenice ◽

A. Temel

Keyword(s):

Visual Field ◽

Learning Effect ◽

Field Testing ◽

Individual Variability ◽

Mean Deviation ◽

Visual Field Testing ◽

Humphrey Perimetry ◽

Group I ◽

Swedish Interactive Threshold Algorithm ◽

Standard Strategy

Purpose To compare learning effect of Swedish interactive threshold algorithm (SITA) standard strategy with full threshold testing. Methods Thirty-nine medical students with no experience in visual field testing had full threshold (FT) and SITA standard for either right or left eyes. They were chosen in such a way that 20 (Group I) had FT for right and SITA for left eyes and 19 (Group II) had SITA standard for right and FT for left eyes. It was designed to have both strategies on same person whereby eliminating inter-individual variability. Visual field testing was repeated in the same week of the first test on the same subject with the same strategy that was chosen for that eye. Results The authors found an improvement in mean deviation (MD) and pattern standard deviation (PSD) of first and second testings correspondingly for FT (MD from –3.04 to –2.55; PSD from –2.60 to –2.29) and SITA standard (MD from –2.86 to –2.20; PSD from 2.25 to 2.10) and changes were statistically significant (p<0.05). To analyze learning effect of visual field testings, we calculated percentage change in MD and PSD for full threshold and SITA standard strategy. The percentage changes in visual field parameters were significantly lower in SITA standard strategy testing for MD (p=0.02) and PSD (p=0.01). Conclusions This study shows that a learning effect is present for both strategies and SITA standard may have a reduced learning effect compared to FT.

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