VISUAL FIELD TEST DEVICE

A visual field device includes a light source and an eyepiece. The light source includes a backlight arranged to generate, in use, light directed towards a first liquid crystal display (LCD) screen and a second LCD screen, the first LCD screen and the second LCD screen overlapping one another and th...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Griffin, Neil, Clarke, Roger
Format:	Patent
Sprache:	eng
Schlagworte:	ADVERTISING ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION CALCULATING COMPUTING COUNTING CRYPTOGRAPHY DIAGNOSIS DISPLAY EDUCATION ELECTRIC DIGITAL DATA PROCESSING HUMAN NECESSITIES HYGIENE IDENTIFICATION MEDICAL OR VETERINARY SCIENCE PHYSICS SEALS SURGERY
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Beschreibung
Zusammenfassung:	A visual field device includes a light source and an eyepiece. The light source includes a backlight arranged to generate, in use, light directed towards a first liquid crystal display (LCD) screen and a second LCD screen, the first LCD screen and the second LCD screen overlapping one another and the backlight such that the light source outputs light transmitted through both the first and second LCD screens. The eyepiece is arranged between the light source and a subject position, the eyepiece being configured to receive light output by the light source and focus the received light towards the subject position. Each of the first and second LCD screens include a respective array of pixels, each pixel being controllable so as to vary its transmittance to light generated by the back-light.