Question

. Answer the following questions about the blind spot that can be found in each human eye (you may draw a figure if it helps you explain the blind spot but be sure you label this figure clearly)

1. Specify the names of the two layers of the retina?
2. Describe where the photoreceptors are located (be specific) AND if they are more superficial or deep to the majority of the nervous tissue of the eye.
3. Where is the blind spot located in the eye? (name AND describe the physical structure)
4. Explain why there is a blind spot in the human eye. Relate this to the structure and function of the retina.
5. Assuming both eyes are open and fully functional, explain why you cannot detect your blind spot.

Answer 1

a. Two layers are An inner layer of nerve tissue called the sensory or neural retina

An outer pigmented layer called the pigment epithelium, which adheres to the choroid.

Inner layer of nerve tissue consists of three separate layer of neurons.

c. Small portion where the optic nerve and blood vessels leave the eyeball. Also known as scotoma, is an obscuration of the visual field. Located in the retina.

e. This is because your brain is so adopt at providing the missing visual information that you never notice that small gap in your visual field.