EVERYDAY SCIENCE

Detailed explanation-1: -In the blind spot, there are no photoreceptors i.e. neither rods or cones, and, therefore, there is no image formation in this area. This is because of the lack of both rods and cones which means no detection of both light or colors.

Detailed explanation-2: -blind spot, small portion of the visual field of each eye that corresponds to the position of the optic disk (also known as the optic nerve head) within the retina. There are no photoreceptors (i.e., rods or cones) in the optic disk, and, therefore, there is no image detection in this area.

Detailed explanation-3: -Temporary scotomas are usually caused by brain disorders such as a seizure, migraine, or reduced blood flow. Fixed, permanent blind spots can be caused by disorders of: The optic nerve, such as those caused by glaucoma (increased pressure inside the eye) or multiple sclerosis. The brain, such as a tumor or stroke.

Detailed explanation-4: -What causes a blind spot in the eye? 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.

Detailed explanation-5: -As a result action potentials are developed and are transmitted by the optic nerve to the brain. Due to the absence of rods and cones in the blind spot eye, no image is formed at that spot. So, the correct answer is ‘rods and cones absent’.-The photoreceptor layer consists of two types of cells namely rods and cones.