Horizontal eccentricity

Horizontal Eccentricity refers to the horizontal axis, measured in degrees, along the visual field. The blind spot extends from an eccentricity d₁ to eccentricity d₂ in temporal direction from the fovea. The size of the blind spot can be calculated as

\arctan \left(\frac{d_2-d_1}{d_1}\right) - \arctan \left(\frac{d_2-d_1}{d_2}\right).

External links

Blind Spot

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