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High-resolution perimetry of the central visual field
H J Kaiser1, J Flammer, P J Bucher
1University Eye Clinic, Basel, Switzerland.
Summary
The Octopus Program M1 and M2X offer high-resolution visual field testing for neurological and macular diseases. These programs precisely detect central visual field defects using advanced staircase procedures and re-testing phases.
Area of Science:
- Ophthalmology
- Neuro-ophthalmology
- Medical Technology
Background:
- The Octopus Program M1 and M2X are designed for detailed visual field testing.
- These programs aim to detect and monitor central or paracentral visual field defects.
Observation:
- Octopus Program M1 tests 59 locations within the central 25 degrees visual field with a resolution of <= 1.4 degrees.
- Octopus Program M2X enhances this with 81 test locations in the central 10 degrees, achieving a resolution of <= 0.7 degrees.
- Differential light sensitivity is measured using the 'Octopus normal strategy' (4/2/1 staircase procedure).
Findings:
- Both programs feature a two-phase approach, including a re-test phase for reliability.
- Program M2X offers finer resolution for central visual field assessment.
- Program M2X's phases are structured into 4 stages and allow for interruptions.
Implications:
- These advanced visual field testing programs can aid in the early detection and management of various visual field abnormalities.
- The high resolution and structured testing protocols support accurate diagnosis in neurological disorders and macular diseases.
- Interruption capability in Program M2X enhances patient comfort and test completion rates.