determines 2. Visual angle and image size on the retina. Visual angle is importa

Question

determines 2. Visual angle and image size on the retina. Visual angle is important because it how large an object's image will be on the back of the eye. The world looks very large to us, but how big is the image of the world you are looking at? a. Suppose that the focal length of the eye (the distance from the lens to the retina) is 2 cm. Your blind spot subtends an angle of roughly 5 deg. How big is the blind spot (in cm) on your retina? (Use the focal length as the distance in the visual angle equation) b. The fovea is roughly 2 deg of visual angle. What is the diameter of the fovea in cm? (Use 2 cm again as the focal length)

Explanation / Answer

2a. Based on these values, the blind spot is 0.17 cm on the retina.

2b. Based on these values, the fovea is 0.07 cm on the retina.

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