Technician, nurse, doctor, optician, optometrist. Risks and precautions You must fix your eyes on the central target on the tangent screen. No changes necessary. No changes necessary. No changes necessary.
Discomfort disappears when the test is finished.
Equipment used Tangent screen. Black-tipped straight pins. Disposable tissues or disposable eye patches. Visual-field recording chart. Stick or other object to help you signal.