A client is experiencing double vision, or diplopia.
The nurse plans care knowing that this client is experiencing a loss of which of the following normal functions of the eye?
- a) Optic nerve function
- b) Binocular vision***
- c) Ocular muscle control
- d) Depth perception.
The correct answer is b) Binocular vision.
Here's why:
- Binocular vision is the ability of the two eyes to work together as a team to send a single, three-dimensional image to the brain. This allows for depth perception and coordination of eye movements.
- Diplopia (double vision) occurs when the two eyes are not aligned properly and send two separate images to the brain. This can lead to difficulty focusing, depth perception problems, and even nausea and dizziness.
- While optic nerve function, ocular muscle control, and depth perception are all important for vision, they are not directly related to the loss of binocular vision that causes diplopia.
Here's a breakdown of the other options:
a) Optic nerve function:
The optic nerve transmits visual information from the eyes to the brain. Damage to the optic nerve can lead to vision loss, but it does not directly cause diplopia.
c) Ocular muscle control:
The eye muscles control the movement of the eyes. Problems with ocular muscle control can lead to strabismus (crossed eyes) or nystagmus (involuntary eye movements), which can contribute to diplopia. However, diplopia can also occur without any underlying problems with ocular muscle control.
d) Depth perception:
Depth perception is the ability to see objects in three dimensions. While diplopia can affect depth perception, it is not the only factor that contributes to it.
Therefore, since diplopia directly results from the loss of binocular vision, it is the most accurate answer for the nurse to consider when planning care for this client.
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Eye diseases