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Tangent Screens provide a way to chart the central and Para-central field of vision for diagnosing pathological conditions.
Testing can be conducted at 3′ to 6′ (1 m to 2 m).
Markings are stitched in semi-visible black thread showing concentric circles, radial lines, and blind spots. Markings ensure ease of testing, scoring, and transcribing the mapped fields for visual field analysis.
AÂ white fixation button is attached.
1 m 15 deg (shown) . . . . . . . . . . . . .931000
1 m 22.5 deg . . . . . . . . . . . . . . . . . .930000