Question

5. Define the terms:
(a) Blind spot on the retina
(b) Persistence of vision of human eye​

Answer 1

Answer:

a]Each of our eyes has a tiny functional blind spot about the size of a pinhead. In this tiny area, where the optic nerve passes through the surface of the retina, there are no photoreceptors. Since there are no photoreceptor cells detecting light, it creates a blind spot.

b]Your eye and brain retain a visual impression for about 1/30 of a second. (The exact time depends on the brightness of the image.) This ability to retain an image is known as persistence of vision. ... The eye retains the image of each frame long enough to give us the illusion of smooth motion.

Answer 2

Explanation:

a)

Each of our eyes has a tiny functional blind spot about the size of a pinhead. In this tiny area, where the optic nerve passes through the surface of the retina, there are no photoreceptors. Since there are no photoreceptor cells detecting light, it creates a blind spot.

b)Your eye and brain retain a visual impression for about 1/30 of a second. (The exact time depends on the brightness of the image.) This ability to retain an image is known as persistence of vision. ... The eye retains the image of each frame long enough to give us the illusion of smooth motion.