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   What are outside normal limits?

   • Outside normal limits. The GHT is described as “outside normal limits” when differences between a matched pair of corresponding zones exceeds the difference found in 99% of the normal population, or when both members of a pair of zones are more abnormal than 99.5% of the individuals with the normative population.

   Standard Automated Perimetry - EyeWiki

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   What does “outside normal limits” mean on a glaucoma test?

   • “Outside Normal Limits” or “Borderline” results indicate field loss that resembles glaucomatous defects. For clinicians who only occasionally interpret visual field tests, the GHT is the best marker to determine if a defect appears suspicious for glaucoma. One way to monitor progressive visual field loss is the visual field index.

   An Optometrist’s Refresher on Visual Field Indices - Eyes On Eyecare

   eyesoneyecare.com/resources/an-optometrists-refresher-on-visual-field-indices/

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   What does 'outside normal limits' mean on a field plot?

   • If the top half and bottom half of the field plot have different results, the plot will state: ‘Outside Normal Limits’ and the result is suspicious of disease. This gives a percentage score for how the patient performed compared to how they should do for their age. A lower percentage indicates visual field loss.

   Visual fields: the jargon - AOP

   www.aop.org.uk/ot/cpd/2020/03/07/visual-fields-the-jargon

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   When is GHT considered outside normal limits?

   • The GHT is described as “outside normal limits” when differences between a matched pair of corresponding zones exceeds the difference found in 99% of the normal population, or when both members of a pair of zones are more abnormal than 99.5% of the individuals with the normative population. Borderline.

   Standard Automated Perimetry - EyeWiki

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   Is there a 'within normal limits' message on the GHT?

   • The 24-2 SITA Standard reveals a single significant superior paracentral defect and a “within normal limits” message on the GHT. Although the point is statistically significant, it might be overlooked.

   Breaking Down Visual Fields in Glaucoma - Review of Optometry

   www.reviewofoptometry.com/article/breaking-down-visual-fields-in-glaucoma

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   What is a normal DB reading?

   • That is, the patient is anticipating the presentation of the stimulus and is responding before the stimulus is seen. Readings of 40 dB or higher indicate an unreliable field that will need to be repeated. It is best to catch these readings while the test is in progress and restart the test. A typical "normal" dB reading is around 30.

   How Do You Interpret a 24-2 Humphrey Visual Field Printout?

   glaucomatoday.com/articles/2007-nov-dec/GT1107_10-php

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2. eyewiki.org › Standard_Automated_PerimetryStandard Automated Perimetry - EyeWiki

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   The GHT is described as “outside normal limits” when differences between a matched pair of corresponding zones exceeds the difference found in 99% of the normal population, or when both members of a pair of zones are more abnormal than 99.5% of the individuals with the normative population.

3. www.fiteyes.com › home › understanding-your-test-resultsUnderstanding Your Test Results - FitEyes.com

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   The color designations are: 1) Green - Within normal limits of the general population for RNFL. 2) Yellow - Borderline for RNFL. 3) Red - Outside normal limits for RNFL and therefore, suggestive of optic nerve damage in representative area.

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5. www.reviewofoptometry.com › article › breaking-downBreaking Down Visual Fields in Glaucoma - Review of Optometry

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   Feb 15, 2021 · A GHT message of “outside normal limits” that is repeatable is strong evidence of glaucoma and is a stand-alone criteria for diagnosing acquired glaucomatous damage according to the Hodapp-Parrish-Anderson criteria. 3

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6. www.reviewofoptometry.com › article › diagnosingDiagnosing Glaucoma: How to Steer Clear of Trouble

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   Jul 15, 2021 · Visual field is reliable, with three adjacent point defects in the superior nasal quadrant, and the glaucoma hemifield test (GHT) is outside normal limits (Figure 9). Here there is good structure-function correlation.

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7. glaucomatoday.com › articles › 2007-nov-decHow Do You Interpret a 24-2 Humphrey Visual Field Printout?

   glaucomatoday.com › articles › 2007-nov-dec

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   The Glaucoma Hemifield Test compares points in the upper field to corresponding points in the lower field and then interprets the results as (a) "outside normal limits" indicating the upper and lower fields are different and may signify glaucoma, (b) borderline, and (c) within normal limits indicating glaucoma may not exist.

8. www.aop.org.uk › ot › cpdVisual fields: the jargon - AOP

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   Mar 7, 2020 · 1. Reliability indicators. These scores tell you how reliable the result of the test is. There are lots of things that can affect the reliability: distractions in the room, incorrect trial lens making the screen blurred, poor instructions or the patient doesn’t really understand what they are doing.

9. eyesoneyecare.com › resources › an-optometristsAn Optometrist’s Refresher on Visual Field Indices

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   Jun 3, 2021 · “Outside Normal Limits” or “Borderline” results indicate field loss that resembles glaucomatous defects. For clinicians who only occasionally interpret visual field tests, the GHT is the best marker to determine if a defect appears suspicious for glaucoma.