Answer :
Final answer:
The patient's 20/50 vision suggests her visual acuity is below average. An eye patch will hinder depth perception, and the younger person more likely has better near-point accommodation. Vertebrates like dogs and cows excel in night vision due to higher rod density and special adaptations in their eyes.
Explanation:
Understanding Visual Acuity and Eye Function
The term 20/50 vision indicates that the patient can see at 20 feet what a person with normal vision can see at 50 feet. This means that her vision is worse than average, requiring her to be closer to objects in order to see them clearly.
Effect of Eye Patch on Vision
Wearing an eye patch over one eye will lead to reduced depth perception because the brain receives visual information from only one eye. This can make tasks like judging distances more challenging, as the brain typically relies on input from both eyes for accurate perception of the environment.
Near-Point Accommodation Test
In the near-point accommodation test, Subject A, with an accommodation distance of 15 cm, is likely the younger person. This is because younger individuals typically have a better ability to accommodate (focus on close objects) than older individuals, who often have a greater near-point distance, such as Subject B's 30 cm.
Night Vision in Vertebrates
Many vertebrates, including cows and domestic dogs and cats, have superior night vision compared to humans due to several anatomical features. These animals often have a higher ratio of rods to cones in their retinas, which enhances their ability to see in low light. Furthermore, many have a reflective layer behind the retina called the tapetum lucidum, which improves their ability to see at night by reflecting light that passes through the retina back into the eye.
Learn more about Vision and Eye Function here:
https://brainly.com/question/38252368
