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- 1. Why is eye tested seperately when using Snellen eye chart? Explain 20/40 vision and a 20/10 vision 2. What factors might account for a difference in the acuity of the two ears? Explain.1. What is the limitation of a split-brain patient when asked to fixate on a dot at the center of their visual field? 2. Describe what the patient can do in terms of identifying or picking it out if a pen was shown in the right visual field and a flower on the left visual field.3) Color vision with retinal implants sensation of white color, i.e., they do not provide color vision. Why do you think that this is so? What do you see as the biggest challenge in front of this? : Retinal implants mainly generate the
- Discuss the importance of performing the Pupillary Light Reflex test. Why is Pupillary Dark Reflex test necessary to perform in the clinic?what will happen if an eyeglasses has: a. two converging lens (explain) b. two diverging lens (explain) c. both converging and diverging lens (explain) P.S. This is not a multiple choice question thank You2. Which of the following statements is a CORRECT description of the structure with its function? Group of answer choices a. Iris functions to refract (bend) light before it reaches the lens b. Sclera functions as a surface for the attachment of extraocular muscles c. Ciliary body functions to secrete vitreous humor d. Lacrimal glands function to produce aqueous humor e. Conjunctiva functions to supply the eye with blood and nutrients.
- 4. The following are the characteristics of our visual perception. Choose the three items that apply. A. The eye has approximately 120 million cones B. Visual angle is affected by both the distance of the object and the size of the eye C. The visual angle indicates how much of the field of view is taken by the object D. Negative contrast results in less accurate reading performance E. The color blue has short wavelength, green medium, red long F. Color markings convey a stronger signal over images or shapes. G. Cones are highly sensitive to light and therefore allow us to see under a low level of illumination.2. A 32-year-old man was diagnosed with damage of the central part of the optic chiasm. Draw a diagram of the visual analyzer and indicate its main structures. How will the transmission of information from the retina to the centers of the cerebral cortex change? How will change the field of view?1. Do rods or cones result in better resolved (more detailed) images? Why? 2. Which area of the retina has the highest resolution (acuity)? Why? 3. Suppose each visual receptive field is monitored by a ganglion cell. Briefly describe the size and density of receptive fields in the retinal area in question (2) compared to other retinal areas. 4. Explain how bending the stereocilia in the cochlea results in the brain receiving a signal.
- The primary function of the lens of the eye is to: Question 7 options: Provide protection across the front of the eye Adjust the shape of the pupil Focus the visual image onto the optic disc Focus the visual image onto the fovea centralis2. Calculate the field of views using the given information: A. Low power objective = 4x; high power objective= 40x; eyepiece= 10x; low power field of view (FOV)= 4.4 mm; what is the high power field of view? B. Scanning power objective= 5x; low power objective=10x; eyepiece= 5x; scanning power field of view (FOV)= 3.5 mm; what is the low power field of view?2. Which of the following statements is a CORRECT description of the structure with its function? Group of answer choices a.Iris functions to refract (bend) light before it reaches the lens b.Sclera functions as a surface for the attachment of extraocular muscles c.The ciliary body functions to secrete vitreous humor d.Lacrimal glands function to produce aqueous humor e.Conjunctiva functions to supply the eye with blood and nutrients