The Visual Field Analyzer of Zeiss is a standard instrument to measure peripheral (side) vision. This analyzer helps in detecting and diagnosing glaucoma, AMD, scotomas, and brain abnormalities. This test is crucial for glaucoma patients and is repeated from time to time to determine if the disease is stable or getting worse.
During the basic vision test on an eye-chart, only the central vision gets tested and not the peripheral vision. Therefore, the reading 20/20 on the eye-chart would mean that you only have perfect central eyesight as far as the peripheral vision is concerned, no clarifications can be approved.
In the Visual Field Analyzer, the test comprises of full horizontal and vertical field of peripheral vision. This analyzer helps in identifying potential diminished or blind spots (scotomas) in the patients’ vision. In this, a ray of light targeted towards a lighted bowl. The ophthalmologist asks the patient to identify the light he views through their peripheral vision and press a button when they see the light point. If the patient is unable to detect the stimuli, then the ophthalmologist diagnoses the patient having trauma or scotomas.