A male client is color blind.
The nurse understands that this client has a problem with:
a- rods.
b- cones.
c- lens.
d- aqueous humor.
Answer B.
Cones provide daylight color vision, and their stimulation is interpreted as color.
If one or more types of cones are absent or defective, color blindness occurs.
Rods are sensitive to low levels of illumination but can’t discriminate color.
The lens is responsible for focusing images. Aqueous humor is a clear watery fluid and isn’t involved with color perception.
The nurse understands that this client has a problem with:
a- rods.
b- cones.
c- lens.
d- aqueous humor.
Answer B.
Cones provide daylight color vision, and their stimulation is interpreted as color.
If one or more types of cones are absent or defective, color blindness occurs.
Rods are sensitive to low levels of illumination but can’t discriminate color.
The lens is responsible for focusing images. Aqueous humor is a clear watery fluid and isn’t involved with color perception.
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Neurologic Practice