Ophthalmic Perimeter

Ophthalmic perimeters are devices used in ophthalmology to measure the visual field of a patient. They are part of the supply class "Ophthalmic Instruments, Equipment, and Supplies" in the supply group "Medical, Dental, and Veterinary Equipment and Supplies."

The visual field refers to the entire area that a person can see while their eyes are fixed on a central point. Ophthalmic perimeters are used to assess and diagnose various eye conditions, such as glaucoma, retinal diseases, and neurological disorders that affect vision.

These devices typically consist of a bowl-shaped instrument with a central fixation point and a screen or projection system. The patient looks at the central point while lights or stimuli are presented at different locations within their visual field. The patient then responds to the stimuli by pressing a button or indicating when they see the light.

By mapping the patient's responses, ophthalmic perimeters can create a visual field chart, also known as a visual field plot or perimetry map. This chart helps ophthalmologists evaluate the extent and quality of a patient's visual field, identify any blind spots or abnormalities, and monitor changes over time.

Ophthalmic perimeters are essential tools for diagnosing and managing eye conditions, as they provide valuable information about the functional status of a patient's visual system. They are commonly used in ophthalmology clinics, hospitals, and research settings.