The document outlines the normal ranges for visual fields as well as various perimetry tests such as Humphrey perimetry's 10-2, 24-2, and 30-2, used for assessing conditions like glaucoma and neuro-ophthalmic issues. It describes the methods for reading visual field results, including key zones and indices for analysis. Additionally, it discusses the criteria for classifying glaucomatous field defects using the Hodapp, Parrish, and Anderson classification.

1. VISUAL FIELDS

2. • A normal visual field extends
approximately
• TEMPORALLY – 100 deg
• NASALLY – 60 deg
• SUPERIORLY – 60 deg
• INFERIORLY – 70 deg
• A physiologic scotoma (a blind spot) exists
at 15° temporally where the optic nerve
leaves the eye

4. Humphey perimetry
• 10-2: Measures 10 degrees temporally and nasally and tests 68 points.
Used for macula, retinal and neuro-ophthalmic conditions and
advanced glaucoma[4]
• 24-2: Measures 24 degrees temporally and 30 degrees nasally and tests
54 points. Used for neuro-ophthalmic conditions and general
screening[5] as well as early detection of glaucoma[6][7]
• 30-2: Measures 30 degrees temporally and nasally and tests 76 points.
Used for general screening, early glaucoma and neurological conditions[6]
• The above tests can be performed in either SITA-Standard or SITA-Fast.
• SITA-Fast is a quicker method of testing. It produces similar results
compared to SITA-Standard, however repeatability is questionable and it is
slightly less sensitive

5. HOW TO READ VISUAL FIELD
ZONE 1 - Patient and test data
ZONE 2 - Reliability index and
foveal threshold
ZONE 3- Gray scale
ZONE 4 - Total deviation plot
ZONE 5- Patern deviation plot
ZONE 6 - Global indices
ZONE 7 - Glaucoma hemifield
tests

6. GOLDMANN PERIMETER

7. ANDERSON CRITERIA
• 3 Or more congruous ‘ non edge ‘ points in typical arcuate area
Depressed p <5% with atleast one point p<1%
• Pattern standard deviation p <5%
• GHT – outside normal limits
Must be demonstrated on 2 field tests
Include all 3 – high specificity

8. HODAPP, PARRISH AND ANDERSON
CLASSIFICATION

9. GLAUCOMATOUS FIELDS DEFECTS

10. OTHER FIELD DEFECTS